Year Total
1800 6.5
1801 6.5
1802 6.5
1803 6.5
1804 6.5
1805 6.5
1806 6.5
1807 6.5
1808 6.5
1809 6.5
1810 6.5
1811 6.5
1812 6.5
1813 6.5
1814 6.5
1815 6.5
1816 6.5
1817 6.5
1818 6.5
1819 6.5
1820 6.5
1821 6.5
1822 6.5
1823 6.5
1824 6.5
1825 6.5
1826 6.5
1827 6.5
1828 6.5
1829 6.5
1830 6.5
1831 6.5
1832 6.5
1833 6.5
1834 6.5
1835 6.5
1836 6.5
1837 6.5
1838 6.5
1839 6.5
1840 6.5
1841 6.5
1842 6.5
1843 6.5
1844 6.5
1845 6.5
1846 6.5
1847 6.5
1848 6.5
1849 6.5
1850 6.5
1851 6.5
1852 6.5
1853 6.5
1854 6.5
1855 6.5
1856 6.5
1857 6.5
1858 6.5
1859 6.5
1860 6.5
1861 6.5
1862 6.5
1863 6.5
1864 6.5
1865 6.5
1866 6.5
1867 6.5
1868 6.5
1869 6.5
1870 6.5
1871 6.5
1872 6.5
1873 6.5
1874 6.5
1875 6.5
1876 6.5
1877 6.5
1878 6.5
1879 6.5
1880 6.5
1881 6.5
1882 6.5
1883 6.5
1884 6.5
1885 6.5
1886 6.5
1887 6.5
1888 6.5
1889 6.5
1890 6.5
1891 6.5
1892 6.5
1893 6.5
1894 6.5
1895 6.5
1896 6.5
1897 6.5
1898 6.5
1899 6.5
1900 6.5
1901 6.5
1902 6.5
1903 6.5
1904 6.5
1905 6.5
1906 6.5
1907 6.5
1908 6.5
1909 6.5
1910 6.5
1911 6.5
1912 6.5
1913 6.5
1914 6.5
1915 6.5
1916 6.5
1917 6.5
1918 6.5
1919 6.5
1920 6.5
1921 6.5
1922 6.5
1923 6.5
1924 6.5
1925 6.5
1926 6.398
1927 6.296
1928 6.194
1929 6.092
1930 5.99
1931 5.888
1932 5.785
1933 5.683
1934 5.581
1935 5.479
1936 5.377
1937 5.275
1938 5.173
1939 5.071
1940 4.969
1941 4.867
1942 4.765
1943 4.663
1944 4.56
1945 4.458
1946 4.356
1947 4.254
1948 4.152
1949 4.05
1950 3.948
1951 3.953
1952 3.969
1953 3.992
1954 4.025
1955 4.066
1956 4.115
1957 4.173
1958 4.237
1959 4.308
1960 4.384
1961 4.462
1962 4.541
1963 4.619
1964 4.694
1965 4.766
1966 4.834
1967 4.899
1968 4.961
1969 5.021
1970 5.081
1971 5.143
1972 5.208
1973 5.275
1974 5.343
1975 5.412
1976 5.48
1977 5.543
1978 5.6
1979 5.648
1980 5.684
1981 5.709
1982 5.722
1983 5.723
1984 5.712
1985 5.689
1986 5.654
1987 5.609
1988 5.554
1989 5.491
1990 5.421
1991 5.343
1992 5.259
1993 5.17
1994 5.078
1995 4.987
1996 4.898
1997 4.814
1998 4.735
1999 4.664
2000 4.6
2001 4.544
2002 4.494
2003 4.449
2004 4.408
2005 4.37
2006 4.335
2007 4.304
2008 4.275
2009 4.246
2010 4.214
2011 4.178
2012 4.136
2013 4.087
2014 4.031
2015 3.97
2016 3.904
2017 3.836
2018 3.77
2019 3.705
2020 3.643
2021 3.584
2022 3.527
2023 3.472
2024 3.419
2030 3.134
2040 2.776
2050 2.518
2070 2.166
2080 2.051
2099 1.933