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 -8
1906 -6
1907 -6
1908 -6
1909 -6
1910 -6
1911 -6
1912 -6
1913 -6
1914 -6
1915 -6
1916 -6
1917 -1
1918 -1
1919 -1
1920 -1
1921 -1
1922 -1
1923 -7
1924 -7
1925 -7
1926 -7
1927 -8
1928 -8
1929 -8
1930 -8
1931 -8
1932 -8
1933 -9
1934 -9
1935 -9
1936 -9
1937 -9
1938 -9
1939 -9
1940 -9
1941 -9
1942 -9
1943 -9
1944 -9
1945 -9
1946 -9
1947 -9
1948 -9
1949 -9
1950 -9
1951 -9
1952 -9
1953 -7
1954 -7
1955 -7
1956 -7
1957 -7
1958 -7
1959 -7
1960 -7
1961 -7
1962 -7
1963 -7
1964 -7
1965 -7
1966 -7
1967 -7
1968 -7
1969 -7
1970 -7
1971 -7
1972 -7
1973 -7
1974 -7
1975 -7
1976 -7
1977 -7
1978 -7
1979 -7
1980 -7
1981 -7
1982 -7
1983 -7
1984 -7
1985 -7
1986 -7
1987 -7
1988 -6
1989 -4
1990 0
1991 0
1992 5
1993 3
1994 3
1995 3
1996 3
1997 3
1998 3
1999 3
2000 6
2001 6
2002 6
2003 6
2004 6
2005 6
2006 6
2007 4
2008 4
2009 4
2010 4
2011 4