Year Total
1800 6.71
1801 6.71
1802 6.71
1803 6.71
1804 6.71
1805 6.71
1806 6.71
1807 6.71
1808 6.71
1809 6.71
1810 6.71
1811 6.71
1812 6.71
1813 6.71
1814 6.71
1815 6.71
1816 6.71
1817 6.71
1818 6.71
1819 6.71
1820 6.71
1821 6.71
1822 6.71
1823 6.71
1824 6.71
1825 6.71
1826 6.71
1827 6.71
1828 6.71
1829 6.71
1830 6.71
1831 6.71
1832 6.71
1833 6.71
1834 6.71
1835 6.71
1836 6.71
1837 6.71
1838 6.71
1839 6.71
1840 6.71
1841 6.71
1842 6.71
1843 6.71
1844 6.71
1845 6.71
1846 6.71
1847 6.71
1848 6.71
1849 6.71
1850 6.71
1851 6.71
1852 6.71
1853 6.71
1854 6.71
1855 6.71
1856 6.71
1857 6.71
1858 6.71
1859 6.71
1860 6.71
1861 6.71
1862 6.71
1863 6.71
1864 6.71
1865 6.71
1866 6.71
1867 6.71
1868 6.71
1869 6.71
1870 6.71
1871 6.71
1872 6.71
1873 6.71
1874 6.71
1875 6.71
1876 6.71
1877 6.71
1878 6.71
1879 6.71
1880 6.71
1881 6.71
1882 6.71
1883 6.71
1884 6.71
1885 6.71
1886 6.71
1887 6.71
1888 6.71
1889 6.71
1890 6.71
1891 6.71
1892 6.71
1893 6.71
1894 6.71
1895 6.71
1896 6.71
1897 6.71
1898 6.71
1899 6.71
1900 6.71
1901 6.71
1902 6.71
1903 6.71
1904 6.71
1905 6.71
1906 6.71
1907 6.71
1908 6.71
1909 6.71
1910 6.71
1911 6.71
1912 6.71
1913 6.71
1914 6.71
1915 6.71
1916 6.71
1917 6.71
1918 6.71
1919 6.71
1920 6.71
1921 6.71
1922 6.71
1923 6.71
1924 6.71
1925 6.71
1926 6.71
1927 6.71
1928 6.71
1929 6.71
1930 6.71
1931 6.71
1932 6.71
1933 6.71
1934 6.71
1935 6.71
1936 6.71
1937 6.71
1938 6.71
1939 6.71
1940 6.71
1941 6.71
1942 6.71
1943 6.71
1944 6.71
1945 6.71
1946 6.71
1947 6.71
1948 6.71
1949 6.71
1950 6.71
1951 6.71
1952 6.7
1953 6.7
1954 6.69
1955 6.69
1956 6.69
1957 6.7
1958 6.7
1959 6.71
1960 6.72
1961 6.73
1962 6.75
1963 6.76
1964 6.78
1965 6.8
1966 6.82
1967 6.84
1968 6.86
1969 6.87
1970 6.88
1971 6.88
1972 6.87
1973 6.86
1974 6.84
1975 6.82
1976 6.79
1977 6.76
1978 6.73
1979 6.69
1980 6.65
1981 6.6
1982 6.54
1983 6.47
1984 6.39
1985 6.29
1986 6.19
1987 6.06
1988 5.92
1989 5.78
1990 5.62
1991 5.46
1992 5.29
1993 5.12
1994 4.96
1995 4.8
1996 4.65
1997 4.52
1998 4.39
1999 4.28
2000 4.19
2001 4.11
2002 4.04
2003 3.98
2004 3.93
2005 3.87
2006 3.82
2007 3.76
2008 3.69
2009 3.61
2010 3.53
2011 3.44
2012 3.36
2013 3.28
2014 3.2
2015 3.14
2016 3.08
2017 3.03
2018 2.98