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