Year Total
1800 6.4
1801 6.4
1802 6.4
1803 6.4
1804 6.4
1805 6.4
1806 6.4
1807 6.4
1808 6.4
1809 6.4
1810 6.4
1811 6.4
1812 6.4
1813 6.4
1814 6.4
1815 6.4
1816 6.4
1817 6.4
1818 6.4
1819 6.4
1820 6.4
1821 6.4
1822 6.4
1823 6.4
1824 6.4
1825 6.4
1826 6.4
1827 6.4
1828 6.4
1829 6.4
1830 6.4
1831 6.4
1832 6.4
1833 6.4
1834 6.4
1835 6.4
1836 6.4
1837 6.4
1838 6.4
1839 6.4
1840 6.4
1841 6.4
1842 6.4
1843 6.4
1844 6.4
1845 6.4
1846 6.4
1847 6.4
1848 6.4
1849 6.4
1850 6.4
1851 6.4
1852 6.4
1853 6.4
1854 6.4
1855 6.4
1856 6.4
1857 6.4
1858 6.4
1859 6.4
1860 6.4
1861 6.4
1862 6.4
1863 6.4
1864 6.4
1865 6.4
1866 6.4
1867 6.4
1868 6.4
1869 6.4
1870 6.4
1871 6.4
1872 6.4
1873 6.4
1874 6.4
1875 6.4
1876 6.4
1877 6.4
1878 6.4
1879 6.4
1880 6.4
1881 6.4
1882 6.4
1883 6.4
1884 6.4
1885 6.4
1886 6.4
1887 6.4
1888 6.4
1889 6.4
1890 6.4
1891 6.4
1892 6.4
1893 6.4
1894 6.4
1895 6.4
1896 6.4
1897 6.4
1898 6.4
1899 6.4
1900 6.4
1901 6.4
1902 6.4
1903 6.4
1904 6.4
1905 6.4
1906 6.4
1907 6.4
1908 6.4
1909 6.4
1910 6.4
1911 6.4
1912 6.4
1913 6.4
1914 6.4
1915 6.4
1916 6.4
1917 6.4
1918 6.4
1919 6.4
1920 6.4
1921 6.4
1922 6.4
1923 6.4
1924 6.4
1925 6.4
1926 6.4
1927 6.4
1928 6.4
1929 6.4
1930 6.4
1931 6.375
1932 6.351
1933 6.326
1934 6.301
1935 6.276
1936 6.252
1937 6.227
1938 6.202
1939 6.178
1940 6.153
1941 6.128
1942 6.104
1943 6.079
1944 6.054
1945 6.029
1946 6.005
1947 5.483
1948 4.932
1949 5.836
1950 6.741
1951 6.736
1952 6.73
1953 6.736
1954 6.754
1955 6.784
1956 6.824
1957 6.874
1958 6.93
1959 6.988
1960 7.043
1961 7.088
1962 7.118
1963 7.125
1964 7.107
1965 7.059
1966 6.978
1967 6.869
1968 6.737
1969 6.59
1970 6.438
1971 6.292
1972 6.16
1973 6.046
1974 5.95
1975 5.867
1976 5.79
1977 5.706
1978 5.606
1979 5.488
1980 5.349
1981 5.189
1982 5.015
1983 4.833
1984 4.645
1985 4.454
1986 4.265
1987 4.077
1988 3.893
1989 3.714
1990 3.538
1991 3.363
1992 3.188
1993 3.013
1994 2.841
1995 2.676
1996 2.524
1997 2.389
1998 2.275
1999 2.183
2000 2.114
2001 2.068
2002 2.041
2003 2.027
2004 2.023
2005 2.025
2006 2.031
2007 2.038
2008 2.044
2009 2.046
2010 2.044
2011 2.036
2012 2.023
2013 2.008
2014 1.99
2015 1.97
2016 1.949
2017 1.928
2018 1.907
2019 1.889
2020 1.872
2021 1.856
2022 1.843
2023 1.83
2024 1.818
2030 1.77
2040 1.749
2050 1.76
2070 1.804
2080 1.824
2099 1.854