Australian Space Academy
INTRODUCTION
To undertand the differences between the various types of sunspots listed here in the tables, please refer to the document SUNSPOTS.
TABLE OF YEARLY SUNSPOT NUMBERS
YEAR + 00 01 02 03 04 05 06 07 08 09 1700 5.0 11.0 16.0 23.0 36.0 58.0 29.0 20.0 10.0 8.0 1710 3.0 0.0 0.0 2.0 11.0 27.0 47.0 63.0 60.0 39.0 1720 28.0 26.0 22.0 11.0 21.0 40.0 78.0 122.0 103.0 73.0 1730 47.0 35.0 11.0 5.0 16.0 34.0 70.0 81.0 111.0 101.0 1740 73.0 40.0 20.0 16.0 5.0 11.0 22.0 40.0 60.0 80.9 1750 83.4 47.7 47.8 30.7 12.2 9.6 10.2 32.4 47.6 54.0 1760 62.9 85.9 61.2 45.1 36.4 20.9 11.4 37.8 69.8 106.1 1770 100.8 81.6 66.5 34.8 30.6 7.0 19.8 92.5 154.4 125.9 1780 84.8 68.1 38.5 22.8 10.2 24.1 82.9 132.0 130.9 118.1 1790 89.9 66.6 60.0 46.9 41.0 21.3 16.0 6.4 4.1 6.8 1800 14.5 34.0 45.0 43.1 47.5 42.2 28.1 10.1 8.1 2.5 1810 0.0 1.4 5.0 12.2 13.9 35.4 45.8 41.1 30.1 23.9 1820 15.6 6.6 4.0 1.8 8.5 16.6 36.3 49.6 64.2 67.0 1830 70.9 47.8 27.5 8.5 13.2 56.9 121.5 138.3 103.2 85.7 1840 64.6 36.7 24.2 10.7 15.0 40.1 61.5 98.5 124.7 96.3 1850 66.6 64.5 54.1 39.0 20.6 6.7 4.3 22.7 54.8 93.8 1860 95.8 77.2 59.1 44.0 47.0 30.5 16.3 7.3 37.6 74.0 1870 139.0 111.2 101.6 66.2 44.7 17.0 11.3 12.4 3.4 6.0 1880 32.3 54.3 59.7 63.7 63.5 52.2 25.4 13.1 6.8 6.3 1890 7.1 35.6 73.0 85.1 78.0 64.0 41.8 26.2 26.7 12.1 1900 9.5 2.7 5.0 24.4 42.0 63.5 53.8 62.0 48.5 43.9 1910 18.6 5.7 3.6 1.4 9.6 47.4 57.1 103.9 80.6 63.6 1920 37.6 26.1 14.2 5.8 16.7 44.3 63.9 69.0 77.8 64.9 1930 35.7 21.2 11.1 5.7 8.7 36.1 79.7 114.4 109.6 88.8 1940 67.8 47.5 30.6 16.3 9.6 33.2 92.6 151.6 136.3 134.7 1950 83.9 69.4 31.5 13.9 4.4 38.0 141.7 190.2 184.8 159.0 1960 112.3 53.9 37.6 27.9 10.2 15.1 47.0 93.8 105.9 105.5 1970 104.5 66.6 68.9 38.0 34.5 15.5 12.6 27.5 92.5 155.4 1980 154.6 140.4 115.9 66.6 45.9 17.9 13.4 29.4 100.2 157.6 1990 142.6 145.7 94.3 54.6 29.9 17.5 8.6 21.5 64.3 93.2 2000 119.6 111.0 104.1 63.8
TABLE OF MONTHLY SUNSPOT NUMBERS
YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1749 58.0 62.6 70.0 55.7 85.0 83.5 94.8 66.3 75.9 75.5 158.6 85.2 1750 73.3 75.9 89.2 88.3 90.0 100.0 85.4 103.0 91.2 65.7 63.3 75.4 1751 70.0 43.5 45.3 56.4 60.7 50.7 66.3 59.8 23.5 23.2 28.5 44.0 1752 35.0 50.0 71.0 59.3 59.7 39.6 78.4 29.3 27.1 46.6 37.6 40.0 1753 44.0 32.0 45.7 38.0 36.0 31.7 22.0 39.0 28.0 25.0 20.0 6.7 1754 0.0 3.0 1.7 13.7 20.7 26.7 18.8 12.3 8.2 24.1 13.2 4.2 1755 10.2 11.2 6.8 6.5 0.0 0.0 8.6 3.2 17.8 23.7 6.8 20.0 1756 12.5 7.1 5.4 9.4 12.5 12.9 3.6 6.4 11.8 14.3 17.0 9.4 1757 14.1 21.2 26.2 30.0 38.1 12.8 25.0 51.3 39.7 32.5 64.7 33.5 1758 37.6 52.0 49.0 72.3 46.4 45.0 44.0 38.7 62.5 37.7 43.0 43.0 1759 48.3 44.0 46.8 47.0 49.0 50.0 51.0 71.3 77.2 59.7 46.3 57.0 1760 67.3 59.5 74.7 58.3 72.0 48.3 66.0 75.6 61.3 50.6 59.7 61.0 1761 70.0 91.0 80.7 71.7 107.2 99.3 94.1 91.1 100.7 88.7 89.7 46.0 1762 43.8 72.8 45.7 60.2 39.9 77.1 33.8 67.7 68.5 69.3 77.8 77.2 1763 56.5 31.9 34.2 32.9 32.7 35.8 54.2 26.5 68.1 46.3 60.9 61.4 1764 59.7 59.7 40.2 34.4 44.3 30.0 30.0 30.0 28.2 28.0 26.0 25.7 1765 24.0 26.0 25.0 22.0 20.2 20.0 27.0 29.7 16.0 14.0 14.0 13.0 1766 12.0 11.0 36.6 6.0 26.8 3.0 3.3 4.0 4.3 5.0 5.7 19.2 1767 27.4 30.0 43.0 32.9 29.8 33.3 21.9 40.8 42.7 44.1 54.7 53.3 1768 53.5 66.1 46.3 42.7 77.7 77.4 52.6 66.8 74.8 77.8 90.6 111.8 1769 73.9 64.2 64.3 96.7 73.6 94.4 118.6 120.3 148.8 158.2 148.1 112.0 1770 104.0 142.5 80.1 51.0 70.1 83.3 109.8 126.3 104.4 103.6 132.2 102.3 1771 36.0 46.2 46.7 64.9 152.7 119.5 67.7 58.5 101.4 90.0 99.7 95.7 1772 100.9 90.8 31.1 92.2 38.0 57.0 77.3 56.2 50.5 78.6 61.3 64.0 1773 54.6 29.0 51.2 32.9 41.1 28.4 27.7 12.7 29.3 26.3 40.9 43.2 1774 46.8 65.4 55.7 43.8 51.3 28.5 17.5 6.6 7.9 14.0 17.7 12.2 1775 4.4 0.0 11.6 11.2 3.9 12.3 1.0 7.9 3.2 5.6 15.1 7.9 1776 21.7 11.6 6.3 21.8 11.2 19.0 1.0 24.2 16.0 30.0 35.0 40.0 1777 45.0 36.5 39.0 95.5 80.3 80.7 95.0 112.0 116.2 106.5 146.0 157.3 1778 177.3 109.3 134.0 145.0 238.9 171.6 153.0 140.0 171.7 156.3 150.3 105.0 1779 114.7 165.7 118.0 145.0 140.0 113.7 143.0 112.0 111.0 124.0 114.0 110.0 1780 70.0 98.0 98.0 95.0 107.2 88.0 86.0 86.0 93.7 77.0 60.0 58.7 1781 98.7 74.7 53.0 68.3 104.7 97.7 73.5 66.0 51.0 27.3 67.0 35.2 1782 54.0 37.5 37.0 41.0 54.3 38.0 37.0 44.0 34.0 23.2 31.5 30.0 1783 28.0 38.7 26.7 28.3 23.0 25.2 32.2 20.0 18.0 8.0 15.0 10.5 1784 13.0 8.0 11.0 10.0 6.0 9.0 6.0 10.0 10.0 8.0 17.0 14.0 1785 6.5 8.0 9.0 15.7 20.7 26.3 36.3 20.0 32.0 47.2 40.2 27.3 1786 37.2 47.6 47.7 85.4 92.3 59.0 83.0 89.7 111.5 112.3 116.0 112.7 1787 134.7 106.0 87.4 127.2 134.8 99.2 128.0 137.2 157.3 157.0 141.5 174.0 1788 138.0 129.2 143.3 108.5 113.0 154.2 141.5 136.0 141.0 142.0 94.7 129.5 1789 114.0 125.3 120.0 123.3 123.5 120.0 117.0 103.0 112.0 89.7 134.0 135.5 1790 103.0 127.5 96.3 94.0 93.0 91.0 69.3 87.0 77.3 84.3 82.0 74.0 1791 72.7 62.0 74.0 77.2 73.7 64.2 71.0 43.0 66.5 61.7 67.0 66.0 1792 58.0 64.0 63.0 75.7 62.0 61.0 45.8 60.0 59.0 59.0 57.0 56.0 1793 56.0 55.0 55.5 53.0 52.3 51.0 50.0 29.3 24.0 47.0 44.0 45.7 1794 45.0 44.0 38.0 28.4 55.7 41.5 41.0 40.0 11.1 28.5 67.4 51.4 1795 21.4 39.9 12.6 18.6 31.0 17.1 12.9 25.7 13.5 19.5 25.0 18.0 1796 22.0 23.8 15.7 31.7 21.0 6.7 26.9 1.5 18.4 11.0 8.4 5.1 1797 14.4 4.2 4.0 4.0 7.3 11.1 4.3 6.0 5.7 6.9 5.8 3.0 1798 2.0 4.0 12.4 1.1 0.0 0.0 0.0 3.0 2.4 1.5 12.5 9.9 1799 1.6 12.6 21.7 8.4 8.2 10.6 2.1 0.0 0.0 4.6 2.7 8.6 YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1800 6.9 9.3 13.9 0.0 5.0 23.7 21.0 19.5 11.5 12.3 10.5 40.1 1801 27.0 29.0 30.0 31.0 32.0 31.2 35.0 38.7 33.5 32.6 39.8 48.2 1802 47.8 47.0 40.8 42.0 44.0 46.0 48.0 50.0 51.8 38.5 34.5 50.0 1803 50.0 50.8 29.5 25.0 44.3 36.0 48.3 34.1 45.3 54.3 51.0 48.0 1804 45.3 48.3 48.0 50.6 33.4 34.8 29.8 43.1 53.0 62.3 61.0 60.0 1805 61.0 44.1 51.4 37.5 39.0 40.5 37.6 42.7 44.4 29.4 41.0 38.3 1806 39.0 29.6 32.7 27.7 26.4 25.6 30.0 26.3 24.0 27.0 25.0 24.0 1807 12.0 12.2 9.6 23.8 10.0 12.0 12.7 12.0 5.7 8.0 2.6 0.0 1808 0.0 4.5 0.0 12.3 13.5 13.5 6.7 8.0 11.7 4.7 10.5 12.3 1809 7.2 9.2 0.9 2.5 2.0 7.7 0.3 0.2 0.4 0.0 0.0 0.0 1810 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1811 0.0 0.0 0.0 0.0 0.0 0.0 6.6 0.0 2.4 6.1 0.8 1.1 1812 11.3 1.9 0.7 0.0 1.0 1.3 0.5 15.6 5.2 3.9 7.9 10.1 1813 0.0 10.3 1.9 16.6 5.5 11.2 18.3 8.4 15.3 27.8 16.7 14.3 1814 22.2 12.0 5.7 23.8 5.8 14.9 18.5 2.3 8.1 19.3 14.5 20.1 1815 19.2 32.2 26.2 31.6 9.8 55.9 35.5 47.2 31.5 33.5 37.2 65.0 1816 26.3 68.8 73.7 58.8 44.3 43.6 38.8 23.2 47.8 56.4 38.1 29.9 1817 36.4 57.9 96.2 26.4 21.2 40.0 50.0 45.0 36.7 25.6 28.9 28.4 1818 34.9 22.4 25.4 34.5 53.1 36.4 28.0 31.5 26.1 31.6 10.9 25.8 1819 32.8 20.7 3.7 20.2 19.6 35.0 31.4 26.1 14.9 27.5 25.1 30.6 1820 19.2 26.6 4.5 19.4 29.3 10.8 20.6 25.9 5.2 8.9 7.9 9.1 1821 21.5 4.2 5.7 9.2 1.7 1.8 2.5 4.8 4.4 18.8 4.4 0.2 1822 0.0 0.9 16.1 13.5 1.5 5.6 7.9 2.1 0.0 0.4 0.0 0.0 1823 0.0 0.0 0.6 0.0 0.0 0.0 0.5 0.0 0.0 0.0 0.0 20.4 1824 21.7 10.8 0.0 19.4 2.8 0.0 0.0 1.4 20.5 25.2 0.0 0.8 1825 5.0 15.5 22.4 3.8 15.5 15.4 30.9 25.7 15.7 15.6 11.7 22.0 1826 17.7 18.2 36.7 24.0 32.4 37.1 52.5 39.6 18.9 50.6 39.5 68.1 1827 34.6 47.4 57.8 46.0 56.3 56.7 42.3 53.7 49.6 56.1 48.2 46.1 1828 52.8 64.4 65.0 61.1 89.1 98.0 54.2 76.4 50.4 54.7 57.0 46.9 1829 43.0 49.4 72.3 95.0 67.4 73.9 90.8 77.6 52.8 57.2 67.6 56.5 1830 52.2 72.1 84.6 106.3 66.3 65.1 43.9 50.7 62.1 84.4 81.2 82.1 1831 47.5 50.1 93.4 54.5 38.1 33.4 45.2 55.0 37.9 46.3 43.5 28.9 1832 30.9 55.6 55.1 26.9 41.3 26.7 14.0 8.9 8.2 21.1 14.3 27.5 1833 11.3 14.9 11.8 2.8 12.9 1.0 7.0 5.7 11.6 7.5 5.9 9.9 1834 4.9 18.1 3.9 1.4 8.8 7.8 8.7 4.0 11.5 24.8 30.5 34.5 1835 7.5 24.5 19.7 61.5 43.6 33.2 59.8 59.0 100.8 95.2 100.0 77.5 1836 88.6 107.6 98.2 142.9 111.4 124.7 116.7 107.8 95.1 137.4 120.9 206.2 1837 188.0 175.6 134.6 138.2 111.7 158.0 162.8 134.0 96.3 123.7 107.0 129.8 1838 144.9 84.8 140.8 126.6 137.6 94.5 108.2 78.8 73.6 90.8 77.4 79.8 1839 105.6 102.5 77.7 61.8 53.8 54.6 84.8 131.2 132.7 90.9 68.8 63.7 1840 81.2 87.7 67.8 65.9 69.2 48.5 60.7 57.8 74.0 55.0 54.3 53.7 1841 24.1 29.9 29.7 40.2 67.5 55.7 30.8 39.3 36.5 28.5 19.8 38.8 1842 20.4 22.1 21.7 26.9 24.9 20.5 12.6 26.6 18.4 38.1 40.5 17.6 1843 13.3 3.5 8.3 9.5 21.1 10.5 9.5 11.8 4.2 5.3 19.1 12.7 1844 9.4 14.7 13.6 20.8 11.6 3.7 21.2 23.9 7.0 21.5 10.7 21.6 1845 25.7 43.6 43.3 57.0 47.8 31.1 30.6 32.3 29.6 40.7 39.4 59.7 1846 38.7 51.0 63.9 69.3 59.9 65.1 46.5 54.8 107.1 55.9 60.4 65.5 1847 62.6 44.9 85.7 44.7 75.4 85.3 52.2 140.6 160.9 180.4 138.9 109.6 1848 159.1 111.8 108.6 107.1 102.2 129.0 139.2 132.6 100.3 132.4 114.6 159.5 1849 157.0 131.7 96.2 102.5 80.6 81.1 78.0 67.7 93.7 71.5 99.0 97.0 1850 78.0 89.4 82.6 44.1 61.6 70.0 39.1 61.6 86.2 71.0 54.8 61.0 1851 75.5 105.4 64.6 56.5 62.6 63.2 36.1 57.4 67.9 62.5 51.0 71.4 1852 68.4 66.4 61.2 65.4 54.9 46.9 42.1 39.7 37.5 67.3 54.3 45.4 1853 41.1 42.9 37.7 47.6 34.7 40.0 45.9 50.4 33.5 42.3 28.8 23.4 1854 15.4 20.0 20.7 26.5 24.0 21.1 18.7 15.8 22.4 12.6 28.2 21.6 1855 12.3 11.4 17.4 4.4 9.1 5.3 0.4 3.1 0.0 9.6 4.2 3.1 1856 0.5 4.9 0.4 6.5 0.0 5.2 4.6 5.9 4.4 4.5 7.7 7.2 1857 13.7 7.4 5.2 11.1 28.6 16.0 22.2 16.9 42.4 40.6 31.4 37.2 1858 39.0 34.9 57.5 38.3 41.4 44.5 56.7 55.3 80.1 91.2 51.9 66.9 1859 83.7 87.6 90.3 85.7 91.0 87.1 95.2 106.8 105.8 114.6 97.2 81.0 1860 82.4 88.3 98.9 71.4 107.1 108.6 116.7 100.3 92.2 90.1 97.9 95.6 YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1861 62.3 77.7 101.0 98.5 56.8 88.1 78.0 82.5 79.9 67.2 53.7 80.5 1862 63.1 64.5 43.6 53.7 64.4 84.0 73.4 62.5 66.6 41.9 50.6 40.9 1863 48.3 56.7 66.4 40.6 53.8 40.8 32.7 48.1 22.0 39.9 37.7 41.2 1864 57.7 47.1 66.3 35.8 40.6 57.8 54.7 54.8 28.5 33.9 57.6 28.6 1865 48.7 39.3 39.5 29.4 34.5 33.6 26.8 37.8 21.6 17.1 24.6 12.8 1866 31.6 38.4 24.6 17.6 12.9 16.5 9.3 12.7 7.3 14.1 9.0 1.5 1867 0.0 0.7 9.2 5.1 2.9 1.5 5.0 4.8 9.8 13.5 9.6 25.2 1868 15.6 15.7 26.5 36.6 26.7 31.1 29.0 34.4 47.2 61.6 59.1 67.6 1869 60.9 59.9 52.7 41.0 103.9 108.4 59.2 79.6 80.6 59.3 78.1 104.3 1870 77.3 114.9 157.6 160.0 176.0 135.6 132.4 153.8 136.0 146.4 147.5 130.0 1871 88.3 125.3 143.2 162.4 145.5 91.7 103.0 110.1 80.3 89.0 105.4 90.4 1872 79.5 120.1 88.4 102.1 107.6 109.9 105.5 92.9 114.6 102.6 112.0 83.9 1873 86.7 107.0 98.3 76.2 47.9 44.8 66.9 68.2 47.1 47.1 55.4 49.2 1874 60.8 64.2 46.4 32.0 44.6 38.2 67.8 61.3 28.0 34.3 28.9 29.3 1875 14.6 21.5 33.8 29.1 11.5 23.9 12.5 14.6 2.4 12.7 17.7 9.9 1876 14.3 15.0 30.6 2.3 5.1 1.6 15.2 8.8 9.9 14.3 9.9 8.2 1877 24.4 8.7 11.9 15.8 21.6 14.2 6.0 6.3 16.9 6.7 14.2 2.2 1878 3.3 6.6 7.8 0.1 5.9 6.4 0.1 0.0 5.3 1.1 4.1 0.5 1879 1.0 0.6 0.0 6.2 2.4 4.8 7.5 10.7 6.1 12.3 13.1 7.3 1880 24.0 27.2 19.3 19.5 23.5 34.1 21.9 48.1 66.0 43.0 30.7 29.6 1881 36.4 53.2 51.5 51.6 43.5 60.5 76.9 58.4 53.2 64.4 54.8 47.3 1882 45.0 69.5 66.8 95.8 64.1 45.2 45.4 40.4 57.7 59.2 84.4 41.8 1883 60.6 46.9 42.8 82.1 31.5 76.3 80.6 46.0 52.6 83.8 84.5 75.9 1884 91.5 86.9 87.5 76.1 66.5 51.2 53.1 55.8 61.9 47.8 36.6 47.2 1885 42.8 71.8 49.8 55.0 73.0 83.7 66.5 50.0 39.6 38.7 30.9 21.7 1886 29.9 25.9 57.3 43.7 30.7 27.1 30.3 16.9 21.4 8.6 0.3 13.0 1887 10.3 13.2 4.2 6.9 20.0 15.7 23.3 21.4 7.4 6.6 6.9 20.7 1888 12.7 7.1 7.8 5.1 7.0 7.1 3.1 2.8 8.8 2.1 10.7 6.7 1889 0.8 8.5 6.7 4.3 2.4 6.4 9.4 20.6 6.5 2.1 0.2 6.7 1890 5.3 0.6 5.1 1.6 4.8 1.3 11.6 8.5 17.2 11.2 9.6 7.8 1891 13.5 22.2 10.4 20.5 41.1 48.3 58.8 33.0 53.8 51.5 41.9 32.5 1892 69.1 75.6 49.9 69.6 79.6 76.3 76.5 101.4 62.8 70.5 65.4 78.6 1893 75.0 73.0 65.7 88.1 84.7 89.9 88.6 129.2 77.9 80.0 75.1 93.8 1894 83.2 84.6 52.3 81.6 101.2 98.9 106.0 70.3 65.9 75.5 56.6 60.0 1895 63.3 67.2 61.0 76.9 67.5 71.5 47.8 68.9 57.7 67.9 47.2 70.7 1896 29.0 57.4 52.0 43.8 27.7 49.0 45.0 27.2 61.3 28.7 38.0 42.6 1897 40.6 29.4 29.1 31.0 20.0 11.3 27.6 21.8 48.1 14.3 8.4 33.3 1898 30.2 36.4 38.3 14.5 25.8 22.3 9.0 31.4 34.8 34.4 30.9 12.6 1899 19.5 9.2 18.1 14.2 7.7 20.5 13.5 2.9 8.4 13.0 7.8 10.5 1900 9.4 13.6 8.6 16.0 15.2 12.1 8.3 4.3 8.3 12.9 4.5 0.3 1901 0.2 2.4 4.5 0.0 10.2 5.8 0.7 1.0 0.6 3.7 3.8 0.0 1902 5.5 0.0 12.4 0.0 2.8 1.4 0.9 2.3 7.6 16.3 10.3 1.1 1903 8.3 17.0 13.5 26.1 14.6 16.3 27.9 28.8 11.1 38.9 44.5 45.6 1904 31.6 24.5 37.2 43.0 39.5 41.9 50.6 58.2 30.1 54.2 38.0 54.6 1905 54.8 85.8 56.5 39.3 48.0 49.0 73.0 58.8 55.0 78.7 107.2 55.5 1906 45.5 31.3 64.5 55.3 57.7 63.2 103.6 47.7 56.1 17.8 38.9 64.7 1907 76.4 108.2 60.7 52.6 42.9 40.4 49.7 54.3 85.0 65.4 61.5 47.3 1908 39.2 33.9 28.7 57.6 40.8 48.1 39.5 90.5 86.9 32.3 45.5 39.5 1909 56.7 46.6 66.3 32.3 36.0 22.6 35.8 23.1 38.8 58.4 55.8 54.2 1910 26.4 31.5 21.4 8.4 22.2 12.3 14.1 11.5 26.2 38.3 4.9 5.8 1911 3.4 9.0 7.8 16.5 9.0 2.2 3.5 4.0 4.0 2.6 4.2 2.2 1912 0.3 0.0 4.9 4.5 4.4 4.1 3.0 0.3 9.5 4.6 1.1 6.4 1913 2.3 2.9 0.5 0.9 0.0 0.0 1.7 0.2 1.2 3.1 0.7 3.8 1914 2.8 2.6 3.1 17.3 5.2 11.4 5.4 7.7 12.7 8.2 16.4 22.3 1915 23.0 42.3 38.8 41.3 33.0 68.8 71.6 69.6 49.5 53.5 42.5 34.5 1916 45.3 55.4 67.0 71.8 74.5 67.7 53.5 35.2 45.1 50.7 65.6 53.0 1917 74.7 71.9 94.8 74.7 114.1 114.9 119.8 154.5 129.4 72.2 96.4 129.3 1918 96.0 65.3 72.2 80.5 76.7 59.4 107.6 101.7 79.9 85.0 83.4 59.2 1919 48.1 79.5 66.5 51.8 88.1 111.2 64.7 69.0 54.7 52.8 42.0 34.9 1920 51.1 53.9 70.2 14.8 33.3 38.7 27.5 19.2 36.3 49.6 27.2 29.9 1921 31.5 28.3 26.7 32.4 22.2 33.7 41.9 22.8 17.8 18.2 17.8 20.3 YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1922 11.8 26.4 54.7 11.0 8.0 5.8 10.9 6.5 4.7 6.2 7.4 17.5 1923 4.5 1.5 3.3 6.1 3.2 9.1 3.5 0.5 13.2 11.6 10.0 2.8 1924 0.5 5.1 1.8 11.3 20.8 24.0 28.1 19.3 25.1 25.6 22.5 16.5 1925 5.5 23.2 18.0 31.7 42.8 47.5 38.5 37.9 60.2 69.2 58.6 98.6 1926 71.8 69.9 62.5 38.5 64.3 73.5 52.3 61.6 60.8 71.5 60.5 79.4 1927 81.6 93.0 69.6 93.5 79.1 59.1 54.9 53.8 68.4 63.1 67.2 45.2 1928 83.5 73.5 85.4 80.6 77.0 91.4 98.0 83.8 89.7 61.4 50.3 59.0 1929 68.9 62.8 50.2 52.8 58.2 71.9 70.2 65.8 34.4 54.0 81.1 108.0 1930 65.3 49.9 35.0 38.2 36.8 28.8 21.9 24.9 32.1 34.4 35.6 25.8 1931 14.6 43.1 30.0 31.2 24.6 15.3 17.4 13.0 19.0 10.0 18.7 17.8 1932 12.1 10.6 11.2 11.2 17.9 22.2 9.6 6.8 4.0 8.9 8.2 11.0 1933 12.3 22.2 10.1 2.9 3.2 5.2 2.8 0.2 5.1 3.0 0.6 0.3 1934 3.4 7.8 4.3 11.3 19.7 6.7 9.3 8.3 4.0 5.7 8.7 15.4 1935 18.6 20.5 23.1 12.2 27.3 45.7 33.9 30.1 42.1 53.2 64.2 61.5 1936 62.8 74.3 77.1 74.9 54.6 70.0 52.3 87.0 76.0 89.0 115.4 123.4 1937 132.5 128.5 83.9 109.3 116.7 130.3 145.1 137.7 100.7 124.9 74.4 88.8 1938 98.4 119.2 86.5 101.0 127.4 97.5 165.3 115.7 89.6 99.1 122.2 92.7 1939 80.3 77.4 64.6 109.1 118.3 101.0 97.6 105.8 112.6 88.1 68.1 42.1 1940 50.5 59.4 83.3 60.7 54.4 83.9 67.5 105.5 66.5 55.0 58.4 68.3 1941 45.6 44.5 46.4 32.8 29.5 59.8 66.9 60.0 65.9 46.3 38.4 33.7 1942 35.6 52.8 54.2 60.7 25.0 11.4 17.7 20.2 17.2 19.2 30.7 22.5 1943 12.4 28.9 27.4 26.1 14.1 7.6 13.2 19.4 10.0 7.8 10.2 18.8 1944 3.7 0.5 11.0 0.3 2.5 5.0 5.0 16.7 14.3 16.9 10.8 28.4 1945 18.5 12.7 21.5 32.0 30.6 36.2 42.6 25.9 34.9 68.8 46.0 27.4 1946 47.6 86.2 76.6 75.7 84.9 73.5 116.2 107.2 94.4 102.3 123.8 121.7 1947 115.7 133.4 129.8 149.8 201.3 163.9 157.9 188.8 169.4 163.6 128.0 116.5 1948 108.5 86.1 94.8 189.7 174.0 167.8 142.2 157.9 143.3 136.3 95.8 138.0 1949 119.1 182.3 157.5 147.0 106.2 121.7 125.8 123.8 145.3 131.6 143.5 117.6 1950 101.6 94.8 109.7 113.4 106.2 83.6 91.0 85.2 51.3 61.4 54.8 54.1 1951 59.9 59.9 55.9 92.9 108.5 100.6 61.5 61.0 83.1 51.6 52.4 45.8 1952 40.7 22.7 22.0 29.1 23.4 36.4 39.3 54.9 28.2 23.8 22.1 34.3 1953 26.5 3.9 10.0 27.8 12.5 21.8 8.6 23.5 19.3 8.2 1.6 2.5 1954 0.2 0.5 10.9 1.8 0.8 0.2 4.8 8.4 1.5 7.0 9.2 7.6 1955 23.1 20.8 4.9 11.3 28.9 31.7 26.7 40.7 42.7 58.5 89.2 76.9 1956 73.6 124.0 118.4 110.7 136.6 116.6 129.1 169.6 173.2 155.3 201.3 192.1 1957 165.0 130.2 157.4 175.2 164.6 200.7 187.2 158.0 235.8 253.8 210.9 239.4 1958 202.5 164.9 190.7 196.0 175.3 171.5 191.4 200.2 201.2 181.5 152.3 187.6 1959 217.4 143.1 185.7 163.3 172.0 168.7 149.6 199.6 145.2 111.4 124.0 125.0 1960 146.3 106.0 102.2 122.0 119.6 110.2 121.7 134.1 127.2 82.8 89.6 85.6 1961 57.9 46.1 53.0 61.4 51.0 77.4 70.2 55.8 63.6 37.7 32.6 39.9 1962 38.7 50.3 45.6 46.4 43.7 42.0 21.8 21.8 51.3 39.5 26.9 23.2 1963 19.8 24.4 17.1 29.3 43.0 35.9 19.6 33.2 38.8 35.3 23.4 14.9 1964 15.3 17.7 16.5 8.6 9.5 9.1 3.1 9.3 4.7 6.1 7.4 15.1 1965 17.5 14.2 11.7 6.8 24.1 15.9 11.9 8.9 16.8 20.1 15.8 17.0 1966 28.2 24.4 25.3 48.7 45.3 47.7 56.7 51.2 50.2 57.2 57.2 70.4 1967 110.9 93.6 111.8 69.5 86.5 67.3 91.5 107.2 76.8 88.2 94.3 126.4 1968 121.8 111.9 92.2 81.2 127.2 110.3 96.1 109.3 117.2 107.7 86.0 109.8 1969 104.4 120.5 135.8 106.8 120.0 106.0 96.8 98.0 91.3 95.7 93.5 97.9 1970 111.5 127.8 102.9 109.5 127.5 106.8 112.5 93.0 99.5 86.6 95.2 83.5 1971 91.3 79.0 60.7 71.8 57.5 49.8 81.0 61.4 50.2 51.7 63.2 82.2 1972 61.5 88.4 80.1 63.2 80.5 88.0 76.5 76.8 64.0 61.3 41.6 45.3 1973 43.4 42.9 46.0 57.7 42.4 39.5 23.1 25.6 59.3 30.7 23.9 23.3 1974 27.6 26.0 21.3 40.3 39.5 36.0 55.8 33.6 40.2 47.1 25.0 20.5 1975 18.9 11.5 11.5 5.1 9.0 11.4 28.2 39.7 13.9 9.1 19.4 7.8 1976 8.1 4.3 21.9 18.8 12.4 12.2 1.9 16.4 13.5 20.6 5.2 15.3 1977 16.4 23.1 8.7 12.9 18.6 38.5 21.4 30.1 44.0 43.8 29.1 43.2 1978 51.9 93.6 76.5 99.7 82.7 95.1 70.4 58.1 138.2 125.1 97.9 122.7 1979 166.6 137.5 138.0 101.5 134.4 149.5 159.4 142.2 188.4 186.2 183.3 176.3 1980 159.6 155.0 126.2 164.1 179.9 157.3 136.3 135.4 155.0 164.7 147.9 174.4 1981 114.0 141.3 135.5 156.4 127.5 90.9 143.8 158.7 167.3 162.4 137.5 150.1 1982 111.2 163.6 153.8 122.0 82.2 110.4 106.1 107.6 118.8 94.7 98.1 127.0 YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1983 84.3 51.0 66.5 80.7 99.2 91.1 82.2 71.8 50.3 55.8 33.3 33.4 1984 57.0 85.4 83.5 69.7 76.4 46.1 37.4 25.5 15.7 12.0 22.8 18.7 1985 16.5 15.9 17.2 16.2 27.5 24.2 30.7 11.1 3.9 18.6 16.2 17.3 1986 2.5 23.2 15.1 18.5 13.7 1.1 18.1 7.4 3.8 35.4 15.2 6.8 1987 10.4 2.4 14.7 39.6 33.0 17.4 33.0 38.7 33.9 60.6 39.9 27.1 1988 59.0 40.0 76.2 88.0 60.1 101.8 113.8 111.6 120.1 125.1 125.1 179.2 1989 161.3 165.1 131.4 130.6 138.5 196.2 126.9 168.9 176.7 159.4 173.0 165.5 1990 177.3 130.5 140.3 140.3 132.2 105.4 149.4 200.3 125.2 145.5 131.4 129.7 1991 136.9 167.5 141.9 140.0 121.3 169.7 173.7 176.3 125.3 144.1 108.2 144.4 1992 150.0 161.1 106.7 99.8 73.8 65.2 85.7 64.5 63.9 88.7 91.8 82.6 1993 59.3 91.0 69.8 62.2 61.3 49.8 57.9 42.2 22.4 56.4 35.6 48.9 1994 57.8 35.5 31.7 16.1 17.8 28.0 35.1 22.5 25.7 44.0 18.0 26.2 1995 24.2 29.9 31.1 14.0 14.5 15.6 14.5 14.3 11.8 21.1 9.0 10.0 1996 11.5 4.4 9.2 4.8 5.5 11.8 8.2 14.4 1.6 0.9 17.9 13.3 1997 5.7 7.6 8.7 15.5 18.5 12.7 10.4 24.4 51.3 22.8 39.0 41.2 1998 31.9 40.3 54.8 53.4 56.3 70.7 66.2 91.7 92.9 55.6 74.0 81.9 1999 62.0 66.3 68.8 63.7 106.4 137.7 113.5 93.7 71.5 116.7 133.2 84.6 2000 90.1 112.9 138.5 125.5 121.6 124.9 170.1 130.5 109.7 99.4 106.8 104.4 2001 95.1 80.1 114.2 108.2 96.6 134.0 82.2 106.8 150.7 125.6 106.5 131.8 2002 113.9 108.0 98.1 120.4 120.8 88.5 99.9 116.4 109.3 97.5 95.0 81.6 2003 79.5 46.2 61.5 60.0 55.2 77.4 85.0 72.7 48.8 65.6 67.2 47.0 2004 37.2 46.0 48.9 39.3 41.5 43.2
TABLE OF MONTHLY SMOOTHED SUNSPOT NUMBERS
YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1750 89.0 90.2 92.3 92.6 88.2 83.8 83.3 81.8 78.6 75.4 72.9 69.6 1751 66.8 64.2 59.5 54.9 51.7 49.0 46.2 45.0 46.4 47.5 47.6 47.1 1752 47.2 46.4 45.3 46.4 47.8 48.0 48.2 47.8 46.0 44.1 42.2 40.9 1753 38.2 36.2 36.7 35.8 34.2 32.1 28.8 25.8 22.8 19.9 18.3 17.4 1754 17.1 15.8 13.9 13.0 12.7 12.3 12.6 13.4 14.0 13.9 12.7 10.7 1755 9.2 8.4 8.4 8.8 8.5 8.9 9.7 9.6 9.4 9.4 10.1 11.1 1756 11.4 11.4 11.3 10.6 10.7 10.6 10.3 10.9 12.4 14.1 16.0 17.1 1757 18.0 20.7 23.8 25.7 28.4 31.4 33.4 35.7 37.9 40.6 42.7 44.4 1758 46.5 46.8 47.2 48.4 47.7 47.2 48.0 48.2 47.7 46.6 45.6 46.0 1759 46.5 48.1 50.1 51.6 52.7 53.4 54.8 56.2 58.0 59.6 61.1 62.0 1760 62.5 63.3 62.8 61.8 62.0 62.7 63.0 64.4 66.0 66.8 68.8 72.4 1761 75.7 77.5 79.8 83.0 85.8 86.5 84.8 82.9 80.7 78.8 75.5 71.7 1762 68.3 64.8 62.5 60.4 59.0 59.8 61.7 60.5 58.3 56.7 55.3 53.2 1763 52.4 51.5 49.8 48.8 47.1 45.8 45.3 46.5 47.9 48.3 48.8 49.1 1764 47.8 46.9 45.4 43.0 40.8 37.8 34.9 32.0 29.9 28.8 27.3 25.8 1765 25.3 25.2 24.6 23.6 22.5 21.4 20.4 19.3 19.1 19.0 18.6 18.1 1766 16.4 14.4 12.8 12.0 11.2 11.2 12.1 13.5 14.5 15.9 17.2 18.6 1767 20.6 22.9 26.0 29.3 32.9 36.4 38.9 41.5 43.1 43.7 46.1 49.9 1768 53.0 55.4 57.8 60.6 63.5 67.4 70.7 71.5 72.1 75.1 77.2 77.8 1769 81.2 86.2 91.5 97.9 103.7 106.1 107.3 111.9 115.8 114.5 112.5 111.9 1770 111.0 110.9 109.3 105.2 102.3 101.2 98.0 91.1 85.7 84.9 88.9 93.9 1771 93.6 89.0 86.1 85.4 83.5 81.9 84.3 88.9 90.1 90.5 86.9 79.5 1772 77.3 77.6 75.4 72.8 70.7 67.8 64.6 60.1 58.3 56.7 54.3 53.3 1773 50.0 46.1 43.5 40.4 37.4 35.6 34.5 35.6 37.3 38.0 38.9 39.3 1774 38.9 38.2 37.0 35.6 34.2 31.9 28.9 24.4 19.8 16.6 13.3 10.6 1775 9.3 8.6 8.5 7.9 7.5 7.2 7.7 8.9 9.2 9.4 10.2 10.7 1776 11.0 11.7 12.9 14.5 16.3 18.5 20.8 22.8 25.2 29.6 35.6 41.0 1777 47.5 55.1 62.9 70.3 78.1 87.6 98.0 106.6 113.6 119.6 128.2 138.6 1778 144.8 148.4 151.9 156.3 158.5 156.5 151.8 151.5 153.2 152.5 148.4 141.9 1779 139.0 137.4 133.8 129.9 127.0 125.7 124.1 119.4 115.7 112.8 109.4 106.9 1780 103.5 100.0 98.2 95.5 91.3 86.9 86.0 86.2 83.4 80.4 79.2 79.5 1781 79.4 78.0 75.4 71.5 69.8 69.1 66.2 62.8 60.6 58.8 55.6 51.0 1782 47.0 44.5 42.9 42.0 40.4 38.7 37.4 36.3 36.0 35.0 33.2 31.3 1783 30.6 29.4 27.7 26.4 25.1 23.6 22.2 20.3 18.3 16.9 15.4 14.1 1784 12.3 10.8 10.0 9.7 9.8 10.0 9.9 9.6 9.5 9.7 10.5 11.9 1785 13.9 15.5 16.9 19.4 22.0 23.5 25.4 28.3 31.6 36.1 42.0 46.3 1786 49.6 54.5 60.7 66.7 72.6 79.3 86.9 93.4 97.5 100.9 104.4 107.9 1787 111.4 115.3 119.2 122.9 125.9 129.5 132.2 133.3 136.6 138.1 136.4 137.8 1788 140.7 141.2 140.4 139.1 136.6 132.8 129.9 128.7 127.6 127.3 128.3 127.3 1789 124.9 122.5 119.9 116.5 116.0 117.9 117.6 117.3 116.4 114.2 111.7 109.2 1790 106.0 103.4 101.2 99.6 97.2 92.5 88.6 84.6 81.0 79.3 77.8 75.9 1791 74.9 73.1 70.8 69.4 67.9 66.9 66.0 65.4 65.1 64.5 64.0 63.4 1792 62.2 61.9 62.2 61.8 61.3 60.5 60.0 59.5 58.8 57.6 56.2 55.4 1793 55.1 54.0 51.3 49.3 48.3 47.3 46.4 45.5 44.3 42.6 41.7 41.4 1794 40.7 40.7 40.7 39.3 39.5 40.8 40.0 38.9 37.6 36.2 34.7 32.7 1795 30.5 28.7 28.2 28.0 25.8 22.7 21.3 20.6 20.1 20.8 20.9 20.1 1796 20.2 19.8 19.0 18.8 17.8 16.6 15.7 14.6 13.3 11.6 9.9 9.5 1797 8.8 8.0 7.7 7.0 6.7 6.5 5.9 5.4 5.7 5.9 5.5 4.7 1798 4.1 3.8 3.5 3.2 3.2 3.8 4.0 4.4 5.1 5.8 6.5 7.3 1799 7.8 7.7 7.5 7.6 7.3 6.8 7.0 7.1 6.6 5.9 5.4 5.9 1800 7.2 8.8 10.1 10.9 11.5 13.2 15.3 17.0 18.5 20.4 22.8 24.3 1801 25.2 26.6 28.3 30.0 32.1 33.7 34.9 36.5 37.7 38.6 39.5 40.7 1802 41.8 42.8 44.1 45.1 45.1 45.0 45.1 45.4 45.1 43.9 43.2 42.8 1803 42.4 41.7 40.8 41.2 42.5 43.1 42.9 42.6 43.2 45.1 45.7 45.2 1804 44.3 43.9 44.6 45.3 46.0 47.0 48.1 48.6 48.6 48.2 47.9 48.3 1805 48.9 49.2 48.8 47.1 44.9 43.1 41.3 39.8 38.4 37.2 36.3 35.2 1806 34.2 33.2 31.7 30.7 30.0 28.7 27.0 25.1 23.4 22.3 21.5 20.2 1807 18.9 17.6 16.3 14.7 13.0 11.1 9.5 8.7 8.0 7.1 6.8 7.0 YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1808 6.8 6.4 6.5 6.6 6.8 7.6 8.4 8.9 9.2 8.8 7.9 7.2 1809 6.7 6.1 5.3 4.6 4.0 3.0 2.2 1.6 1.1 1.0 0.8 0.4 1810 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1811 0.3 0.6 0.7 1.0 1.3 1.4 1.9 2.4 2.5 2.6 2.6 2.7 1812 2.5 2.9 3.7 3.7 3.9 4.6 4.5 4.4 4.8 5.5 6.4 7.0 1813 8.1 8.6 8.7 10.1 11.5 12.0 13.1 14.1 14.3 14.8 15.1 15.3 1814 15.4 15.2 14.6 14.0 13.5 13.7 13.8 14.5 16.2 17.4 17.9 19.8 1815 22.2 24.8 27.6 29.2 30.7 33.5 35.7 37.5 41.0 44.1 46.7 47.6 1816 47.3 46.4 46.1 47.7 48.7 47.3 46.2 46.2 46.7 46.3 44.0 42.8 1817 43.2 44.5 45.0 43.2 41.6 41.1 41.0 39.5 35.0 32.4 34.1 35.3 1818 34.2 32.7 31.7 31.5 31.0 30.2 30.0 29.8 28.8 27.3 25.3 23.9 1819 24.0 23.9 23.2 22.6 23.0 23.8 23.4 23.1 23.4 23.4 23.7 23.1 1820 21.7 21.2 20.8 19.6 18.1 16.5 15.7 14.9 14.0 13.6 12.0 10.5 1821 9.4 7.8 6.8 7.2 7.5 7.0 5.7 4.7 5.0 5.6 5.8 5.9 1822 6.3 6.4 6.1 5.2 4.2 4.0 4.0 4.0 3.3 2.1 1.4 1.1 1823 0.6 0.2 0.1 0.1 0.1 0.9 2.7 4.0 4.5 5.3 6.2 6.3 1824 6.3 6.3 7.2 9.1 10.2 9.4 7.9 7.4 8.5 8.8 8.6 9.8 1825 11.7 14.0 14.9 14.3 14.3 15.7 17.1 17.8 18.5 19.9 21.5 23.1 1826 24.9 26.4 27.1 28.7 31.3 34.4 37.0 38.9 41.0 42.8 44.7 46.5 1827 46.9 47.1 48.9 50.4 51.0 50.5 50.3 51.8 52.8 53.7 55.7 58.8 1828 61.0 62.5 63.5 63.4 63.7 64.1 63.8 62.7 62.4 64.1 64.6 62.7 1829 63.2 64.8 65.0 65.2 65.7 66.6 67.3 68.7 70.1 71.1 71.5 71.1 1830 68.8 65.7 65.0 66.5 68.2 69.8 70.7 69.6 69.1 67.3 63.9 61.4 1831 60.2 60.4 59.6 57.0 53.8 50.0 47.1 46.7 45.3 42.5 41.5 41.4 1832 39.8 36.6 33.4 31.1 28.9 27.6 26.7 24.2 20.7 17.9 15.7 13.5 1833 12.1 11.7 11.7 11.3 10.3 9.3 8.3 8.1 7.9 7.5 7.3 7.4 1834 7.8 7.8 7.7 8.4 10.2 12.2 13.3 13.7 14.7 17.8 21.8 24.3 1835 27.5 31.9 37.9 44.5 50.4 55.1 60.2 67.1 73.8 80.5 86.7 93.3 1836 99.5 103.9 105.7 107.2 109.9 116.1 125.6 132.6 136.9 138.2 138.1 139.5 1837 142.8 145.8 146.9 146.4 145.3 141.5 136.5 130.9 127.4 127.2 127.8 126.2 1838 121.3 116.7 113.5 111.2 108.5 105.2 101.5 100.6 98.7 93.4 87.2 82.0 1839 79.4 80.6 85.3 87.7 87.4 86.3 84.7 83.0 82.0 81.8 82.6 83.0 1840 81.7 77.6 72.1 68.2 66.1 65.1 62.3 57.5 53.5 50.8 49.7 49.9 1841 49.0 47.0 44.6 42.0 39.4 37.4 36.6 36.1 35.4 34.6 32.2 29.0 1842 26.8 25.5 24.2 23.8 25.1 25.1 23.9 22.8 21.5 20.2 19.3 18.8 1843 18.2 17.5 16.3 14.3 12.0 10.9 10.6 10.9 11.6 12.3 12.3 11.7 1844 11.9 12.8 13.5 14.3 14.6 14.6 15.7 17.5 20.0 22.7 25.7 28.4 1845 29.9 30.7 32.0 33.7 35.7 38.5 40.6 41.5 42.6 44.0 45.0 46.9 1846 49.0 50.6 54.8 58.6 60.1 61.3 62.5 63.2 63.9 63.8 63.4 64.9 1847 66.0 69.8 75.6 83.0 91.5 96.6 102.5 109.3 113.0 116.6 120.3 123.2 1848 128.7 131.9 129.1 124.6 121.6 122.6 124.6 125.4 125.7 125.0 123.9 121.0 1849 116.4 111.2 108.2 105.4 102.2 98.9 93.0 88.0 85.7 82.7 79.4 78.2 1850 76.1 74.2 73.7 73.3 71.5 68.1 66.5 67.1 67.0 66.8 67.3 67.1 1851 66.7 66.4 65.4 64.3 63.8 64.1 64.2 62.3 60.5 60.8 60.8 59.8 1852 59.4 58.9 56.9 55.8 56.2 55.2 53.0 50.9 48.9 47.2 45.6 44.5 1853 44.4 45.0 45.2 44.0 41.9 39.9 38.0 35.9 34.3 32.7 31.4 30.1 1854 28.2 25.6 23.7 22.0 20.8 20.7 20.5 20.0 19.5 18.4 16.9 15.6 1855 14.2 12.9 11.4 10.4 9.2 7.5 6.2 5.4 4.5 3.8 3.5 3.2 1856 3.3 3.6 3.9 3.9 3.8 4.1 4.9 5.5 5.8 6.2 7.6 9.2 1857 10.4 11.6 13.7 16.7 19.2 21.5 23.8 26.0 29.3 32.6 34.3 36.0 1858 38.6 41.7 44.8 48.5 51.5 53.6 56.7 60.7 64.3 67.6 71.7 75.5 1859 78.9 82.6 85.9 87.9 90.8 93.2 93.8 93.8 94.1 93.9 94.0 95.5 1860 97.3 98.0 97.1 95.5 94.5 95.2 95.0 93.7 93.3 94.5 93.6 90.6 1861 88.2 85.8 84.5 83.1 80.3 77.8 77.2 76.7 73.8 69.5 67.9 68.1 1862 67.7 66.7 65.3 63.7 62.5 60.8 58.5 57.5 58.2 58.6 57.6 55.3 1863 51.8 49.5 47.1 45.1 44.5 44.0 44.4 44.4 44.0 43.8 43.0 43.2 1864 44.8 46.0 46.6 46.6 47.2 47.5 46.6 45.9 44.4 43.0 42.5 41.3 1865 39.1 37.2 36.2 35.2 33.2 31.1 29.8 29.0 28.4 27.2 25.9 24.2 1866 22.8 21.0 19.4 18.7 17.9 16.8 15.0 12.1 9.9 8.7 7.8 6.7 1867 5.9 5.4 5.2 5.3 5.3 6.3 7.9 9.2 10.5 12.6 14.9 17.1 1868 19.3 21.6 24.4 27.9 32.0 35.8 39.5 43.2 46.1 47.4 50.8 57.3 YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1869 61.7 64.9 68.2 69.4 70.1 72.5 74.7 77.6 84.3 93.6 101.6 105.7 1870 109.9 116.1 121.5 127.4 133.9 137.9 139.4 140.3 140.1 139.6 138.5 135.4 1871 132.3 129.3 125.1 120.4 116.3 112.9 110.9 110.3 107.8 103.0 98.9 98.1 1872 98.9 98.3 99.0 101.0 101.9 101.9 101.9 101.6 101.5 100.8 97.3 92.1 1873 87.8 85.1 81.3 76.2 71.5 67.7 65.2 62.3 58.3 54.3 52.4 52.0 1874 51.7 51.5 50.4 49.0 47.4 45.5 42.7 39.0 36.7 36.1 34.6 32.6 1875 29.7 25.4 22.4 20.5 19.1 17.8 17.0 16.7 16.3 15.1 13.7 12.5 1876 11.7 11.5 11.6 12.0 11.7 11.3 11.7 11.8 10.8 10.6 11.8 13.1 1877 13.2 12.7 12.9 12.9 12.7 12.7 11.5 10.6 10.3 9.5 8.2 7.2 1878 6.6 6.1 5.4 4.7 4.0 3.5 3.3 3.0 2.4 2.3 2.5 2.2 1879 2.5 3.2 3.7 4.2 5.1 5.7 7.0 9.0 10.9 12.3 13.7 15.8 1880 17.7 19.8 23.9 27.6 29.6 31.3 32.8 34.4 36.8 39.5 41.6 43.6 1881 47.0 49.7 49.6 49.9 51.8 53.6 54.7 55.7 57.0 59.5 62.2 62.4 1882 60.5 58.4 57.8 57.8 58.8 59.8 60.3 60.0 58.0 56.5 54.5 54.5 1883 57.2 58.9 58.9 59.8 60.8 62.2 64.9 67.9 71.4 73.0 74.2 74.6 1884 72.4 71.7 72.5 71.4 67.9 64.7 61.5 58.8 56.6 54.2 53.6 55.2 1885 57.1 57.4 56.2 54.9 54.3 53.0 51.4 49.0 47.4 47.2 45.0 40.9 1886 37.0 34.1 32.0 30.0 27.4 25.8 24.6 23.3 20.5 16.8 14.8 13.9 1887 13.1 13.0 12.6 11.9 12.1 12.7 13.2 13.0 12.9 13.0 12.4 11.4 1888 10.2 8.6 7.9 7.8 7.8 7.3 6.3 5.8 5.8 5.8 5.5 5.3 1889 5.5 6.5 7.2 7.1 6.7 6.2 6.4 6.3 5.9 5.7 5.7 5.6 1890 5.4 5.0 5.0 5.8 6.6 7.0 7.4 8.6 9.8 10.8 13.1 16.5 1891 20.5 23.4 26.0 29.2 32.2 34.6 37.9 42.5 46.4 50.0 53.7 56.5 1892 58.4 62.0 65.2 66.3 68.1 71.0 73.2 73.3 73.9 75.3 76.3 77.1 1893 78.1 79.8 81.6 82.6 83.4 84.5 85.4 86.3 86.2 85.3 85.8 86.8 1894 87.9 86.2 83.2 82.6 81.6 79.4 77.2 75.6 75.3 75.4 73.8 71.3 1895 67.7 65.2 64.8 64.2 63.5 63.5 62.5 60.7 59.9 58.2 55.1 52.5 1896 51.5 49.6 48.0 46.6 44.5 43.0 42.3 41.6 39.5 38.0 37.1 35.3 1897 33.0 32.0 31.2 30.1 28.3 26.6 25.8 25.7 26.3 26.0 25.6 26.3 1898 26.0 25.6 25.4 25.7 27.5 27.6 26.3 24.7 22.7 21.9 21.1 20.3 1899 20.4 19.4 17.1 15.1 13.2 12.2 11.7 11.4 11.2 10.9 11.3 11.3 1900 10.7 10.5 10.6 10.6 10.4 9.9 9.1 8.2 7.6 6.8 5.9 5.4 1901 4.8 4.4 3.9 3.2 2.8 2.8 3.0 3.1 3.3 3.6 3.3 2.8 1902 2.7 2.7 3.1 3.9 4.7 5.0 5.2 6.0 6.7 7.9 9.5 10.6 1903 12.3 14.5 15.8 16.9 19.3 22.5 25.4 26.6 27.9 29.6 31.4 33.5 1904 35.5 37.7 39.7 41.1 41.5 41.6 42.9 46.4 49.8 50.4 50.6 51.3 1905 52.5 53.5 54.5 56.6 60.5 63.4 63.1 60.4 58.5 59.5 60.6 61.5 1906 63.4 64.2 63.8 61.3 55.9 53.5 55.1 59.6 62.7 62.4 61.7 60.1 1907 56.9 55.0 56.4 59.6 62.5 62.8 60.5 55.8 51.4 50.3 50.4 50.6 1908 50.5 51.6 53.2 51.9 49.9 48.9 49.3 50.5 52.6 53.1 51.9 50.6 1909 49.4 46.4 41.6 40.7 42.2 43.3 42.6 40.7 38.2 35.4 33.8 32.8 1910 31.5 30.1 29.1 27.7 24.7 20.6 17.6 15.7 14.2 14.0 13.8 12.8 1911 12.0 11.2 10.0 7.5 6.0 5.8 5.6 5.1 4.6 4.0 3.3 3.1 1912 3.2 3.0 3.1 3.4 3.4 3.4 3.7 3.9 3.8 3.5 3.2 2.8 1913 2.6 2.5 2.2 1.8 1.7 1.5 1.5 1.5 1.6 2.4 3.3 3.9 1914 4.6 5.0 5.8 6.5 7.4 8.8 10.4 12.9 16.1 18.6 20.7 24.3 1915 29.4 34.8 38.9 42.3 45.3 46.9 48.3 49.8 51.5 53.9 56.9 58.6 1916 57.8 55.6 54.0 53.7 54.6 56.3 58.3 60.2 62.1 63.3 65.1 68.7 1917 73.4 81.2 89.7 94.1 96.3 100.7 104.8 105.4 104.2 103.5 102.2 98.3 1918 95.5 92.8 88.5 87.0 87.0 83.5 78.6 77.2 77.5 76.1 75.4 78.0 1919 78.4 75.2 72.8 70.4 67.4 64.6 63.7 62.8 61.9 60.5 56.7 51.4 1920 46.8 43.2 40.3 39.4 38.7 37.9 36.8 34.9 32.1 31.0 31.3 30.6 1921 31.0 31.7 31.1 29.0 27.3 26.5 25.3 24.4 25.5 25.8 24.3 22.5 1922 20.1 18.1 16.9 15.8 14.9 14.4 13.9 12.6 9.4 7.1 6.7 6.6 1923 6.4 5.9 6.0 6.6 6.9 6.4 5.6 5.6 5.7 5.8 6.8 8.1 1924 9.8 11.6 12.9 13.9 15.1 16.1 16.9 17.9 19.3 20.8 22.6 24.5 1925 25.9 27.1 29.4 32.6 36.0 40.9 47.1 51.8 55.6 57.7 58.9 60.9 1926 62.5 64.1 65.1 65.2 65.4 64.7 64.3 65.7 66.9 69.5 72.4 72.4 1927 71.9 71.7 71.7 71.7 71.6 70.5 69.1 68.4 68.2 68.4 67.7 69.0 1928 72.1 75.2 77.3 78.1 77.4 77.2 77.2 76.1 74.2 71.6 69.7 68.1 1929 66.1 64.2 61.1 58.5 59.5 62.8 64.7 64.0 62.9 61.6 60.1 57.4 YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1930 53.6 49.9 48.1 47.2 44.5 39.1 33.6 31.2 30.7 30.2 29.4 28.4 1931 27.6 26.9 25.9 24.3 22.6 21.6 21.1 19.7 17.5 15.9 14.8 14.8 1932 14.8 14.2 13.3 12.6 12.1 11.4 11.2 11.6 12.1 11.7 10.7 9.4 1933 8.4 7.9 7.6 7.4 6.9 6.1 5.3 4.3 3.5 3.6 4.6 5.4 1934 5.7 6.3 6.6 6.7 7.1 8.1 9.3 10.5 11.8 12.6 13.0 14.9 1935 17.6 19.5 22.0 25.6 29.9 34.1 37.9 42.0 46.5 51.3 55.1 57.2 1936 59.0 62.1 65.9 68.8 72.4 77.2 82.6 87.8 90.3 92.1 96.1 101.2 1937 107.6 113.5 116.7 119.2 119.0 115.8 113.0 111.2 110.9 110.7 110.8 109.8 1938 109.3 109.2 107.9 106.3 107.2 109.4 108.8 106.3 103.6 103.1 103.0 102.8 1939 100.1 96.9 97.4 97.9 95.2 90.9 87.5 85.5 85.5 84.3 79.6 76.3 1940 74.3 73.0 71.1 67.8 66.0 66.7 67.6 66.8 64.6 61.9 59.7 57.7 1941 56.6 54.7 52.8 52.4 51.2 48.9 47.1 47.0 47.7 49.2 50.1 47.9 1942 43.9 40.2 36.5 33.3 31.9 31.1 29.6 27.7 25.6 23.0 21.1 20.5 1943 20.1 19.9 19.6 18.8 17.5 16.5 16.0 14.4 12.5 10.8 9.2 8.6 1944 8.2 7.7 7.8 8.4 8.8 9.2 10.2 11.3 12.3 14.0 16.5 19.0 1945 21.9 23.8 25.1 28.1 31.7 33.1 34.3 38.6 43.9 48.1 52.1 56.0 1946 60.6 67.0 72.9 76.8 81.4 88.6 95.3 100.1 104.3 109.6 117.6 126.2 1947 131.7 136.8 143.4 149.0 151.8 151.7 151.2 148.9 145.5 145.7 146.2 145.3 1948 144.8 142.8 140.5 138.2 135.8 135.3 136.6 141.1 147.7 148.5 143.9 139.2 1949 136.6 134.5 133.2 133.0 134.8 136.0 134.4 130.0 124.4 121.0 119.6 118.0 1950 115.0 111.9 106.4 99.5 92.9 86.6 82.2 79.0 75.3 72.2 71.4 72.3 1951 71.7 69.5 69.8 70.7 70.2 69.8 68.6 66.3 63.3 59.2 53.0 46.8 1952 43.2 42.0 39.5 36.0 33.6 31.9 30.8 29.4 28.2 27.6 27.1 26.0 1953 24.1 21.6 19.9 18.9 17.4 15.2 12.8 11.5 11.4 10.4 8.8 7.4 1954 6.4 5.6 4.2 3.4 3.7 4.2 5.4 7.2 7.8 7.9 9.5 12.0 1955 14.2 16.4 19.5 23.4 28.8 35.1 40.1 46.5 55.5 64.4 73.0 81.0 1956 88.8 98.5 109.3 118.7 127.4 136.9 145.5 149.6 151.5 155.8 159.6 164.3 1957 170.2 172.2 174.3 181.0 185.5 187.9 191.4 194.4 197.3 199.5 200.8 200.0 1958 199.0 200.9 201.3 196.8 191.4 186.8 185.2 184.9 183.8 182.2 180.7 180.5 1959 178.6 176.9 174.5 169.2 165.1 161.4 155.8 151.3 146.3 141.1 137.2 132.5 1960 128.9 125.0 121.6 119.6 117.0 113.9 108.6 102.4 97.9 93.3 87.9 83.7 1961 80.2 74.8 68.8 64.3 60.1 55.8 53.1 52.5 52.3 51.4 50.5 48.7 1962 45.2 41.8 39.8 39.4 39.2 38.3 36.8 34.9 32.7 30.8 30.0 29.8 1963 29.4 29.8 29.7 29.1 28.7 28.2 27.7 27.2 26.9 26.0 23.8 21.3 1964 19.5 17.8 15.4 12.7 10.8 10.2 10.3 10.2 9.9 9.6 10.1 11.0 1965 11.7 12.0 12.5 13.6 14.6 15.0 15.5 16.4 17.4 19.7 22.3 24.5 1966 27.7 31.3 34.5 37.4 40.7 44.7 50.3 56.7 63.1 67.6 70.2 72.7 1967 75.0 78.8 82.2 84.6 87.5 91.3 94.1 95.3 95.3 95.0 97.1 100.6 1968 102.6 102.9 104.7 107.2 107.6 106.6 105.2 104.8 107.0 109.9 110.6 110.1 1969 110.0 109.6 108.0 106.4 106.2 106.1 105.9 106.5 105.4 104.1 104.6 104.9 1970 105.6 106.0 106.2 106.1 105.8 105.3 103.8 101.0 97.2 93.9 89.4 84.1 1971 80.4 77.8 74.4 70.9 68.1 66.7 65.4 64.6 65.8 66.2 66.8 69.4 1972 70.8 71.2 72.4 73.4 72.9 70.5 68.2 65.5 62.2 60.6 58.7 55.1 1973 50.7 46.4 44.0 42.6 40.6 38.9 37.3 36.0 34.2 32.5 31.6 31.4 1974 32.7 34.4 34.0 33.9 34.6 34.5 34.0 33.1 32.1 30.2 27.5 25.2 1975 23.0 22.1 21.2 18.6 16.8 16.0 15.0 14.3 14.4 15.4 16.1 16.3 1976 15.2 13.2 12.2 12.6 12.5 12.2 12.9 14.0 14.3 13.5 13.5 14.8 1977 16.7 18.1 20.0 22.2 24.2 26.3 29.0 33.4 39.1 45.6 51.9 56.9 1978 61.3 64.5 69.6 76.9 83.2 89.3 97.4 104.0 108.4 111.1 113.3 117.7 1979 123.7 130.9 136.5 141.1 147.3 153.0 155.0 155.4 155.7 157.8 162.3 164.5 1980 163.9 162.6 160.9 158.7 156.3 154.7 152.8 150.3 150.1 150.2 147.7 142.7 1981 140.3 141.5 143.0 143.4 142.9 141.5 140.3 141.1 142.8 142.2 138.8 137.8 1982 137.0 133.3 129.2 124.3 119.9 117.3 115.2 109.4 101.0 95.7 94.7 94.6 1983 92.8 90.3 85.9 81.5 77.1 70.5 65.5 65.8 67.9 68.2 66.8 64.0 1984 60.2 56.4 53.0 49.8 47.5 46.5 44.2 39.6 33.9 28.9 24.7 21.7 1985 20.5 19.6 18.6 18.3 18.3 18.0 17.4 17.1 17.3 17.3 16.8 15.3 1986 13.8 13.1 13.0 13.7 14.3 13.8 13.7 13.2 12.3 13.2 14.9 16.3 1987 17.6 19.6 22.1 24.4 26.5 28.4 31.3 34.8 39.0 43.6 46.7 51.3 1988 58.2 64.6 71.3 77.5 83.8 93.7 104.3 113.7 121.2 125.3 130.4 137.6 1989 142.0 145.0 149.7 153.5 156.9 158.4 158.5 157.7 156.6 157.4 157.5 153.5 1990 150.6 152.9 152.0 149.3 147.0 143.8 140.6 140.5 142.1 142.1 141.7 143.9 YEAR Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1991 147.6 147.6 146.6 146.5 145.5 145.2 146.3 146.6 144.9 141.7 138.1 131.7 1992 123.7 115.4 108.2 103.3 100.3 97.1 90.7 84.0 79.5 76.4 74.4 73.2 1993 71.4 69.3 66.6 63.6 59.9 56.1 54.7 52.3 48.4 44.9 41.2 38.4 1994 36.6 34.8 34.1 33.7 32.5 30.8 28.5 26.8 26.6 26.5 26.2 25.6 1995 24.2 23.0 22.1 20.6 19.2 18.2 17.0 15.4 13.4 12.1 11.3 10.8 1996 10.4 10.1 9.7 8.4 8.0 8.5 8.4 8.3 8.4 8.8 9.8 10.4 1997 10.5 11.0 13.5 16.5 18.4 20.4 22.7 25.1 28.4 31.9 35.0 39.0 1998 43.8 49.0 53.5 56.6 59.4 62.5 65.5 67.8 69.5 70.5 73.0 77.9 1999 82.6 84.6 83.8 85.5 90.5 93.1 94.3 97.5 102.3 107.8 111.0 111.1 2000 112.9 116.8 119.9 120.8 119.0 118.7 119.8 118.6 116.3 114.5 112.7 112.0 2001 108.7 104.0 104.8 107.5 108.6 109.8 111.7 113.6 114.1 114.0 115.5 114.6 2002 113.5 114.6 113.3 110.5 108.8 106.2 102.7 98.7 94.6 90.5 85.2 82.0 2003 80.8 78.3 74.0 70.1 67.6 65.0 61.8 60.1 59.6 58.2 56.8 54.8
Australian Space Academy