Year Total
1800 5.5
1801 5.5
1802 5.5
1803 5.5
1804 5.5
1805 5.5
1806 5.5
1807 5.5
1808 5.5
1809 5.5
1810 5.5
1811 5.5
1812 5.5
1813 5.5
1814 5.5
1815 5.5
1816 5.5
1817 5.5
1818 5.5
1819 5.5
1820 5.5
1821 5.5
1822 5.5
1823 5.5
1824 5.5
1825 5.5
1826 5.5
1827 5.5
1828 5.5
1829 5.5
1830 5.5
1831 5.5
1832 5.5
1833 5.5
1834 5.5
1835 5.5
1836 5.5
1837 5.5
1838 5.5
1839 5.5
1840 5.5
1841 5.5
1842 5.5
1843 5.5
1844 5.5
1845 5.5
1846 5.5
1847 5.5
1848 5.5
1849 5.5
1850 5.5
1851 5.5
1852 5.5
1853 5.5
1854 5.5
1855 5.5
1856 5.5
1857 5.5
1858 5.5
1859 5.5
1860 5.5
1861 5.5
1862 5.5
1863 5.5
1864 5.5
1865 5.5
1866 5.5
1867 5.5
1868 5.5
1869 5.5
1870 5.5
1871 5.5
1872 5.5
1873 5.5
1874 5.5
1875 5.5
1876 5.5
1877 5.5
1878 5.5
1879 5.5
1880 5.5
1881 5.5
1882 5.5
1883 5.5
1884 5.5
1885 5.5
1886 5.5
1887 5.5
1888 5.5
1889 5.5
1890 5.5
1891 5.5
1892 5.5
1893 5.5
1894 5.5
1895 5.5
1896 5.5
1897 5.5
1898 5.5
1899 5.5
1900 5.5
1901 5.5
1902 5.5
1903 5.5
1904 5.5
1905 5.5
1906 5.5
1907 5.5
1908 5.5
1909 5.5
1910 5.5
1911 5.5
1912 5.5
1913 5.5
1914 5.5
1915 5.5
1916 5.5
1917 5.5
1918 5.5
1919 5.5
1920 5.5
1921 5.5
1922 5.5
1923 5.5
1924 5.5
1925 5.5
1926 5.5
1927 5.5
1928 5.5
1929 5.5
1930 5.5
1931 5.475
1932 5.45
1933 5.425
1934 5.4
1935 5.375
1936 5.35
1937 5.325
1938 5.3
1939 5.275
1940 5.25
1941 5.153
1942 5.056
1943 4.96
1944 4.863
1945 4.766
1946 4.999
1947 5.199
1948 4.906
1949 5.537
1950 5.292
1951 5.262
1952 5.973
1953 5.669
1954 5.955
1955 5.978
1956 5.605
1957 6.205
1958 5.496
1959 4.266
1960 3.986
1961 3.28
1962 5.969
1963 7.413
1964 6.12
1965 6.022
1966 6.211
1967 5.252
1968 6.37
1969 5.67
1970 5.746
1971 5.396
1972 4.92
1973 4.506
1974 4.15
1975 3.576
1976 3.254
1977 2.866
1978 2.743
1979 2.798
1980 2.316
1981 2.713
1982 2.618
1983 2.72
1984 2.769
1985 2.811
1986 2.826
1987 2.806
1988 2.745
1989 2.644
1990 2.506
1991 2.342
1992 2.171
1993 2.009
1994 1.865
1995 1.746
1996 1.656
1997 1.591
1998 1.546
1999 1.52
2000 1.51
2001 1.514
2002 1.527
2003 1.546
2004 1.566
2005 1.585
2006 1.602
2007 1.617
2008 1.63
2009 1.642
2010 1.65
2011 1.657
2012 1.663
2013 1.668
2014 1.674
2015 1.679
2016 1.685
2017 1.691
2018 1.696
2019 1.702
2020 1.707
2021 1.712
2022 1.717
2023 1.722
2024 1.727
2030 1.754
2040 1.788
2050 1.815
2070 1.852
2080 1.864
2099 1.884