Year Total
1800 6.32
1801 6.32
1802 6.32
1803 6.32
1804 6.32
1805 6.32
1806 6.32
1807 6.32
1808 6.32
1809 6.32
1810 6.32
1811 6.32
1812 6.32
1813 6.32
1814 6.32
1815 6.32
1816 6.32
1817 6.32
1818 6.32
1819 6.32
1820 6.32
1821 6.32
1822 6.32
1823 6.32
1824 6.32
1825 6.32
1826 6.32
1827 6.32
1828 6.32
1829 6.32
1830 6.32
1831 6.32
1832 6.32
1833 6.32
1834 6.32
1835 6.32
1836 6.32
1837 6.32
1838 6.32
1839 6.32
1840 6.32
1841 6.32
1842 6.32
1843 6.32
1844 6.32
1845 6.32
1846 6.32
1847 6.32
1848 6.32
1849 6.32
1850 6.32
1851 6.32
1852 6.32
1853 6.32
1854 6.32
1855 6.32
1856 6.32
1857 6.32
1858 6.32
1859 6.32
1860 6.32
1861 6.32
1862 6.32
1863 6.32
1864 6.32
1865 6.32
1866 6.32
1867 6.32
1868 6.32
1869 6.32
1870 6.32
1871 6.32
1872 6.32
1873 6.32
1874 6.32
1875 6.32
1876 6.32
1877 6.32
1878 6.32
1879 6.32
1880 6.32
1881 6.32
1882 6.32
1883 6.32
1884 6.32
1885 6.32
1886 6.32
1887 6.32
1888 6.32
1889 6.32
1890 6.32
1891 6.32
1892 6.32
1893 6.32
1894 6.32
1895 6.32
1896 6.32
1897 6.32
1898 6.32
1899 6.32
1900 6.32
1901 6.32
1902 6.32
1903 6.32
1904 6.32
1905 6.32
1906 6.32
1907 6.32
1908 6.32
1909 6.32
1910 6.32
1911 6.32
1912 6.32
1913 6.32
1914 6.32
1915 6.32
1916 6.32
1917 6.32
1918 6.32
1919 6.32
1920 6.32
1921 6.32
1922 6.32
1923 6.32
1924 6.32
1925 6.32
1926 6.32
1927 6.32
1928 6.32
1929 6.32
1930 6.32
1931 6.32
1932 6.32
1933 6.32
1934 6.32
1935 6.32
1936 6.32
1937 6.32
1938 6.32
1939 6.32
1940 6.32
1941 6.32
1942 6.32
1943 6.32
1944 6.32
1945 6.32
1946 6.32
1947 6.32
1948 6.32
1949 6.32
1950 6.32
1951 6.32
1952 6.33
1953 6.35
1954 6.36
1955 6.38
1956 6.4
1957 6.42
1958 6.44
1959 6.46
1960 6.48
1961 6.5
1962 6.52
1963 6.54
1964 6.56
1965 6.58
1966 6.59
1967 6.61
1968 6.62
1969 6.62
1970 6.62
1971 6.61
1972 6.6
1973 6.57
1974 6.53
1975 6.47
1976 6.39
1977 6.28
1978 6.14
1979 5.99
1980 5.81
1981 5.63
1982 5.45
1983 5.27
1984 5.1
1985 4.95
1986 4.8
1987 4.67
1988 4.54
1989 4.41
1990 4.29
1991 4.17
1992 4.05
1993 3.93
1994 3.82
1995 3.7
1996 3.57
1997 3.45
1998 3.33
1999 3.21
2000 3.1
2001 2.99
2002 2.89
2003 2.8
2004 2.72
2005 2.66
2006 2.61
2007 2.58
2008 2.56
2009 2.56
2010 2.57
2011 2.57
2012 2.57
2013 2.57
2014 2.55
2015 2.52
2016 2.49
2017 2.45
2018 2.41