Year Total
1800 6.67
1801 6.67
1802 6.67
1803 6.67
1804 6.67
1805 6.67
1806 6.67
1807 6.67
1808 6.67
1809 6.67
1810 6.67
1811 6.67
1812 6.67
1813 6.67
1814 6.67
1815 6.67
1816 6.67
1817 6.67
1818 6.67
1819 6.67
1820 6.67
1821 6.67
1822 6.67
1823 6.67
1824 6.67
1825 6.67
1826 6.67
1827 6.67
1828 6.67
1829 6.67
1830 6.67
1831 6.67
1832 6.67
1833 6.67
1834 6.67
1835 6.67
1836 6.67
1837 6.67
1838 6.67
1839 6.67
1840 6.67
1841 6.67
1842 6.67
1843 6.67
1844 6.67
1845 6.67
1846 6.67
1847 6.67
1848 6.67
1849 6.67
1850 6.67
1851 6.67
1852 6.67
1853 6.67
1854 6.67
1855 6.67
1856 6.67
1857 6.67
1858 6.67
1859 6.67
1860 6.67
1861 6.67
1862 6.67
1863 6.67
1864 6.67
1865 6.67
1866 6.67
1867 6.67
1868 6.67
1869 6.67
1870 6.67
1871 6.67
1872 6.67
1873 6.67
1874 6.67
1875 6.67
1876 6.67
1877 6.67
1878 6.67
1879 6.67
1880 6.67
1881 6.67
1882 6.67
1883 6.67
1884 6.67
1885 6.67
1886 6.67
1887 6.67
1888 6.67
1889 6.67
1890 6.67
1891 6.67
1892 6.67
1893 6.67
1894 6.67
1895 6.67
1896 6.67
1897 6.67
1898 6.67
1899 6.67
1900 6.67
1901 6.67
1902 6.67
1903 6.67
1904 6.67
1905 6.67
1906 6.67
1907 6.67
1908 6.67
1909 6.67
1910 6.67
1911 6.67
1912 6.67
1913 6.67
1914 6.67
1915 6.67
1916 6.67
1917 6.67
1918 6.67
1919 6.67
1920 6.67
1921 6.67
1922 6.67
1923 6.67
1924 6.67
1925 6.67
1926 6.67
1927 6.67
1928 6.67
1929 6.67
1930 6.67
1931 6.67
1932 6.67
1933 6.67
1934 6.67
1935 6.67
1936 6.67
1937 6.67
1938 6.67
1939 6.67
1940 6.67
1941 6.67
1942 6.67
1943 6.67
1944 6.67
1945 6.67
1946 6.67
1947 6.67
1948 6.67
1949 6.67
1950 6.67
1951 6.67
1952 6.67
1953 6.67
1954 6.67
1955 6.67
1956 6.67
1957 6.67
1958 6.67
1959 6.67
1960 6.67
1961 6.67
1962 6.67
1963 6.67
1964 6.67
1965 6.67
1966 6.67
1967 6.67
1968 6.67
1969 6.67
1970 6.67
1971 6.67
1972 6.68
1973 6.69
1974 6.69
1975 6.69
1976 6.69
1977 6.67
1978 6.64
1979 6.6
1980 6.55
1981 6.5
1982 6.46
1983 6.41
1984 6.36
1985 6.31
1986 6.23
1987 6.13
1988 5.99
1989 5.83
1990 5.64
1991 5.43
1992 5.22
1993 5
1994 4.8
1995 4.6
1996 4.4
1997 4.2
1998 4
1999 3.8
2000 3.6
2001 3.42
2002 3.24
2003 3.09
2004 2.95
2005 2.84
2006 2.73
2007 2.64
2008 2.55
2009 2.46
2010 2.38
2011 2.31
2012 2.24
2013 2.18
2014 2.13
2015 2.09
2016 2.05
2017 2.02
2018 1.99