SWISS FEDERAL OBSERVATORY SUNSPOT NUMBERS 1700-1987 1700 5.0D0 1701 11.0D0 1702 16.0D0 1703 23.0D0 1704 36.0D0 1705 58.0D0 1706 29.0D0 1707 20.0D0 1708 10.0D0 1709 8.0D0 1710 3.0D0 1711 0.0D0 1712 0.0D0 1713 2.0D0 1714 11.0D0 1715 27.0D0 1716 47.0D0 1717 63.0D0 1718 60.0D0 1719 39.0D0 1720 28.0D0 1721 26.0D0 1722 22.0D0 1723 11.0D0 1724 21.0D0 1725 40.0D0 1726 78.0D0 1727 122.0D0 1728 103.0D0 1729 73.0D0 1730 47.0D0 1731 35.0D0 1732 11.0D0 1733 5.0D0 1734 16.0D0 1735 34.0D0 1736 70.0D0 1737 81.0D0 1738 111.0D0 1739 101.0D0 1740 73.0D0 1741 40.0D0 1742 20.0D0 1743 16.0D0 1744 5.0D0 1745 11.0D0 1746 22.0D0 1747 40.0D0 1748 60.0D0 1749 80.9D0 1750 83.4D0 1751 47.7D0 1752 47.8D0 1753 30.7D0 1754 12.2D0 1755 9.6D0 1756 10.2D0 1757 32.4D0 1758 47.6D0 1759 54.0D0 1760 62.9D0 1761 85.9D0 1762 61.2D0 1763 45.1D0 1764 36.4D0 1765 20.9D0 1766 11.4D0 1767 37.8D0 1768 69.8D0 1769 106.1D0 1770 100.8D0 1771 81.6D0 1772 66.5D0 1773 34.8D0 1774 30.6D0 1775 7.0D0 1776 19.8D0 1777 92.5D0 1778 154.4D0 1779 125.9D0 1780 84.8D0 1781 68.1D0 1782 38.5D0 1783 22.8D0 1784 10.2D0 1785 24.1D0 1786 82.9D0 1787 132.0D0 1788 130.9D0 1789 118.1D0 1790 89.9D0 1791 66.6D0 1792 60.0D0 1793 46.9D0 1794 41.0D0 1795 21.3D0 1796 16.0D0 1797 6.4D0 1798 4.1D0 1799 6.8D0 1800 14.5D0 1801 34.0D0 1802 45.0D0 1803 43.1D0 1804 47.5D0 1805 42.2D0 1806 28.1D0 1807 10.1D0 1808 8.1D0 1809 2.5D0 1810 0.0D0 1811 1.4D0 1812 5.0D0 1813 12.2D0 1814 13.9D0 1815 35.4D0 1816 45.8D0 1817 41.1D0 1818 30.1D0 1819 23.9D0 1820 15.6D0 1821 6.6D0 1822 4.0D0 1823 1.8D0 1824 8.5D0 1825 16.6D0 1826 36.3D0 1827 49.6D0 1828 64.2D0 1829 67.0D0 1830 70.9D0 1831 47.8D0 1832 27.5D0 1833 8.5D0 1834 13.2D0 1835 56.9D0 1836 121.5D0 1837 138.3D0 1838 103.2D0 1839 85.7D0 1840 64.6D0 1841 36.7D0 1842 24.2D0 1843 10.7D0 1844 15.0D0 1845 40.1D0 1846 61.5D0 1847 98.5D0 1848 124.7D0 1849 96.3D0 1850 66.6D0 1851 64.5D0 1852 54.1D0 1853 39.0D0 1854 20.6D0 1855 6.7D0 1856 4.3D0 1857 22.7D0 1858 54.8D0 1859 93.8D0 1860 95.8D0 1861 77.2D0 1862 59.1D0 1863 44.0D0 1864 47.0D0 1865 30.5D0 1866 16.3D0 1867 7.3D0 1868 37.6D0 1869 74.0D0 1870 139.0D0 1871 111.2D0 1872 101.6D0 1873 66.2D0 1874 44.7D0 1875 17.0D0 1876 11.3D0 1877 12.4D0 1878 3.4D0 1879 6.0D0 1880 32.3D0 1881 54.3D0 1882 59.7D0 1883 63.7D0 1884 63.5D0 1885 52.2D0 1886 25.4D0 1887 13.1D0 1888 6.8D0 1889 6.3D0 1890 7.1D0 1891 35.6D0 1892 73.0D0 1893 85.1D0 1894 78.0D0 1895 64.0D0 1896 41.8D0 1897 26.2D0 1898 26.7D0 1899 12.1D0 1900 9.5D0 1901 2.7D0 1902 5.0D0 1903 24.4D0 1904 42.0D0 1905 63.5D0 1906 53.8D0 1907 62.0D0 1908 48.5D0 1909 43.9D0 1910 18.6D0 1911 5.7D0 1912 3.6D0 1913 1.4D0 1914 9.6D0 1915 47.4D0 1916 57.1D0 1917 103.9D0 1918 80.6D0 1919 63.6D0 1920 37.6D0 1921 26.1D0 1922 14.2D0 1923 5.8D0 1924 16.7D0 1925 44.3D0 1926 63.9D0 1927 69.0D0 1928 77.8D0 1929 64.9D0 1930 35.7D0 1931 21.2D0 1932 11.1D0 1933 5.7D0 1934 8.7D0 1935 36.1D0 1936 79.7D0 1937 114.4D0 1938 109.6D0 1939 88.8D0 1940 67.8D0 1941 47.5D0 1942 30.6D0 1943 16.3D0 1944 9.6D0 1945 33.2D0 1946 92.6D0 1947 151.6D0 1948 136.3D0 1949 134.7D0 1950 83.9D0 1951 69.4D0 1952 31.5D0 1953 13.9D0 1954 4.4D0 1955 38.0D0 1956 141.7D0 1957 190.2D0 1958 184.8D0 1959 159.0D0 1960 112.3D0 1961 53.9D0 1962 37.5D0 1963 27.9D0 1964 10.2D0 1965 15.1D0 1966 47.0D0 1967 93.8D0 1968 105.9D0 1969 105.5D0 1970 104.5D0 1971 66.6D0 1972 68.9D0 1973 38.0D0 1974 34.5D0 1975 15.5D0 1976 12.6D0 1977 27.5D0 1978 92.5D0 1979 155.4D0 1980 154.6D0 1981 140.4D0 1982 115.9D0 1983 66.6D0 1984 45.9D0 1985 17.9D0 1986 13.4D0 1987 29.3D0