Year Number
1800 -10
1801 -10
1802 -10
1803 -10
1804 -10
1805 -10
1806 -10
1807 -10
1808 -10
1809 -10
1810 -10
1811 -10
1812 -10
1813 -10
1814 -10
1815 -10
1816 -10
1817 -10
1818 -10
1819 -10
1820 -10
1821 -10
1822 -10
1823 -10
1824 -10
1825 -10
1826 -10
1827 -10
1828 -10
1829 -10
1830 -10
1831 -10
1832 -10
1833 -10
1834 -10
1835 -10
1836 -10
1837 -10
1838 -10
1839 -10
1840 -10
1841 -10
1842 -10
1843 -10
1844 -10
1845 -10
1846 -10
1847 -10
1848 -10
1849 -10
1850 -10
1851 -10
1852 -10
1853 -10
1854 -10
1855 -10
1856 -10
1857 -10
1858 -10
1859 -10
1860 -10
1861 -10
1862 -10
1863 -10
1864 -10
1865 -10
1866 -10
1867 -10
1868 -10
1869 -10
1870 -10
1871 -10
1872 -10
1873 -10
1874 -10
1875 -10
1876 -10
1877 -10
1878 -10
1879 -10
1880 -10
1881 -10
1882 -10
1883 -10
1884 -10
1885 -10
1886 -10
1887 -10
1888 -10
1889 -10
1890 -10
1891 -10
1892 -10
1893 -10
1894 -10
1895 -10
1896 -10
1897 -10
1898 -10
1899 -10
1900 -10
1901 -10
1902 -10
1903 -10
1904 -10
1905 -10
1906 0
1907 0
1908 0
1909 0
1910 0
1911 0
1912 0
1913 0
1914 0
1915 0
1916 0
1917 0
1918 0
1919 0
1920 0
1921 -1
1922 -3
1923 -4
1924 -6
1925 -7
1926 -7
1927 -7
1928 -7
1929 -7
1930 -7
1931 -7
1932 -7
1933 -7
1934 -7
1935 -8
1936 -8
1937 -8
1938 -8
1939 -8
1940 -8
1941 -1
1942 -1
1943 -1
1944 -1
1945 -1
1946 -1
1947 -1
1948 -1
1949 -1
1950 -1
1951 -1
1952 -1
1953 -4
1954 -7
1955 -10
1956 -10
1957 -10
1958 -10
1959 -10
1960 -10
1961 -10
1962 -10
1963 -10
1964 -10
1965 -10
1966 -10
1967 -10
1968 -10
1969 -10
1970 -10
1971 -10
1972 -10
1973 -10
1974 -10
1975 -10
1976 -10
1977 -10
1978 -10
1979 0
1980 -2
1981 -4
1982 -6
1983 -6
1984 -6
1985 -6
1986 -6
1987 -6
1988 -6
1989 -6
1990 -6
1991 -6
1992 -6
1993 -6
1994 -6
1995 -6
1996 -6
1997 3
1998 3
1999 3
2000 3
2001 3
2002 3
2003 3
2004 -6
2005 -6
2006 -6
2007 -6
2008 -6
2009 -7
2010 -7
2011 -7