Year Total
1800 6.52
1801 6.52
1802 6.52
1803 6.52
1804 6.52
1805 6.52
1806 6.52
1807 6.52
1808 6.52
1809 6.52
1810 6.52
1811 6.52
1812 6.52
1813 6.52
1814 6.52
1815 6.52
1816 6.52
1817 6.52
1818 6.52
1819 6.52
1820 6.52
1821 6.52
1822 6.52
1823 6.52
1824 6.52
1825 6.52
1826 6.52
1827 6.52
1828 6.52
1829 6.52
1830 6.52
1831 6.52
1832 6.52
1833 6.52
1834 6.52
1835 6.52
1836 6.52
1837 6.52
1838 6.52
1839 6.52
1840 6.52
1841 6.52
1842 6.52
1843 6.52
1844 6.52
1845 6.52
1846 6.52
1847 6.52
1848 6.52
1849 6.52
1850 6.52
1851 6.52
1852 6.52
1853 6.52
1854 6.52
1855 6.52
1856 6.52
1857 6.52
1858 6.52
1859 6.52
1860 6.52
1861 6.52
1862 6.52
1863 6.52
1864 6.52
1865 6.52
1866 6.52
1867 6.52
1868 6.52
1869 6.52
1870 6.52
1871 6.52
1872 6.52
1873 6.52
1874 6.52
1875 6.52
1876 6.52
1877 6.52
1878 6.52
1879 6.52
1880 6.52
1881 6.52
1882 6.52
1883 6.52
1884 6.52
1885 6.52
1886 6.52
1887 6.52
1888 6.52
1889 6.52
1890 6.52
1891 6.52
1892 6.52
1893 6.52
1894 6.52
1895 6.52
1896 6.52
1897 6.52
1898 6.52
1899 6.52
1900 6.52
1901 6.52
1902 6.52
1903 6.52
1904 6.52
1905 6.52
1906 6.52
1907 6.52
1908 6.52
1909 6.52
1910 6.52
1911 6.52
1912 6.52
1913 6.52
1914 6.52
1915 6.52
1916 6.52
1917 6.52
1918 6.52
1919 6.52
1920 6.52
1921 6.52
1922 6.52
1923 6.52
1924 6.52
1925 6.52
1926 6.52
1927 6.519
1928 6.519
1929 6.518
1930 6.518
1931 6.517
1932 6.517
1933 6.516
1934 6.516
1935 6.516
1936 6.515
1937 6.515
1938 6.514
1939 6.514
1940 6.513
1941 6.513
1942 6.513
1943 6.512
1944 6.512
1945 6.511
1946 6.511
1947 6.51
1948 6.51
1949 6.509
1950 6.509
1951 6.488
1952 6.451
1953 6.421
1954 6.397
1955 6.38
1956 6.369
1957 6.364
1958 6.365
1959 6.368
1960 6.373
1961 6.376
1962 6.375
1963 6.367
1964 6.347
1965 6.314
1966 6.268
1967 6.207
1968 6.132
1969 6.039
1970 5.917
1971 5.751
1972 5.541
1973 5.298
1974 5.037
1975 4.794
1976 4.611
1977 4.514
1978 4.513
1979 4.606
1980 4.767
1981 4.956
1982 5.13
1983 5.256
1984 5.324
1985 5.336
1986 5.308
1987 5.271
1988 5.256
1989 5.273
1990 5.34
1991 5.469
1992 5.651
1993 5.874
1994 6.125
1995 6.384
1996 6.627
1997 6.832
1998 6.986
1999 7.079
2000 7.112
2001 7.092
2002 7.037
2003 6.965
2004 6.881
2005 6.79
2006 6.695
2007 6.591
2008 6.479
2009 6.36
2010 6.237
2011 6.111
2012 5.983
2013 5.855
2014 5.728
2015 5.603
2016 5.481
2017 5.36
2018 5.241
2019 5.123
2020 5.008
2021 4.895
2022 4.784
2023 4.675
2024 4.568
2030 3.982
2040 3.245
2050 2.765
2070 2.202
2080 2.057
2099 1.924