Year Total 1800 6.48 1801 6.48 1802 6.48 1803 6.48 1804 6.48 1805 6.48 1806 6.48 1807 6.48 1808 6.48 1809 6.48 1810 6.48 1811 6.48 1812 6.48 1813 6.48 1814 6.48 1815 6.48 1816 6.48 1817 6.48 1818 6.48 1819 6.48 1820 6.48 1821 6.48 1822 6.48 1823 6.48 1824 6.48 1825 6.48 1826 6.48 1827 6.48 1828 6.48 1829 6.48 1830 6.48 1831 6.48 1832 6.48 1833 6.48 1834 6.48 1835 6.48 1836 6.48 1837 6.48 1838 6.48 1839 6.48 1840 6.48 1841 6.48 1842 6.48 1843 6.48 1844 6.48 1845 6.48 1846 6.48 1847 6.48 1848 6.48 1849 6.48 1850 6.48 1851 6.48 1852 6.48 1853 6.48 1854 6.48 1855 6.48 1856 6.48 1857 6.48 1858 6.48 1859 6.48 1860 6.48 1861 6.48 1862 6.48 1863 6.48 1864 6.48 1865 6.48 1866 6.48 1867 6.48 1868 6.48 1869 6.48 1870 6.48 1871 6.48 1872 6.48 1873 6.48 1874 6.48 1875 6.48 1876 6.48 1877 6.48 1878 6.48 1879 6.48 1880 6.48 1881 6.48 1882 6.48 1883 6.48 1884 6.48 1885 6.48 1886 6.48 1887 6.48 1888 6.48 1889 6.48 1890 6.48 1891 6.48 1892 6.48 1893 6.48 1894 6.48 1895 6.48 1896 6.48 1897 6.48 1898 6.48 1899 6.48 1900 6.48 1901 6.48 1902 6.48 1903 6.48 1904 6.48 1905 6.48 1906 6.48 1907 6.48 1908 6.48 1909 6.48 1910 6.48 1911 6.48 1912 6.48 1913 6.48 1914 6.48 1915 6.48 1916 6.48 1917 6.48 1918 6.48 1919 6.48 1920 6.48 1921 6.48 1922 6.48 1923 6.48 1924 6.48 1925 6.48 1926 6.48 1927 6.48 1928 6.48 1929 6.48 1930 6.48 1931 6.492 1932 6.504 1933 6.515 1934 6.527 1935 6.539 1936 6.551 1937 6.563 1938 6.574 1939 6.586 1940 6.598 1941 6.61 1942 6.622 1943 6.633 1944 6.645 1945 6.657 1946 6.669 1947 6.681 1948 6.692 1949 6.704 1950 6.716 1951 6.728 1952 6.748 1953 6.762 1954 6.769 1955 6.77 1956 6.765 1957 6.754 1958 6.738 1959 6.718 1960 6.696 1961 6.672 1962 6.648 1963 6.627 1964 6.607 1965 6.593 1966 6.586 1967 6.585 1968 6.587 1969 6.587 1970 6.578 1971 6.549 1972 6.496 1973 6.415 1974 6.31 1975 6.183 1976 6.043 1977 5.899 1978 5.761 1979 5.634 1980 5.521 1981 5.423 1982 5.337 1983 5.259 1984 5.189 1985 5.127 1986 5.074 1987 5.029 1988 4.989 1989 4.952 1990 4.913 1991 4.866 1992 4.81 1993 4.742 1994 4.663 1995 4.575 1996 4.482 1997 4.39 1998 4.302 1999 4.219 2000 4.14 2001 4.062 2002 3.982 2003 3.897 2004 3.809 2005 3.72 2006 3.633 2007 3.551 2008 3.477 2009 3.413 2010 3.357 2011 3.308 2012 3.264 2013 3.221 2014 3.18 2015 3.138 2016 3.097 2017 3.057 2018 3.017 2019 2.98 2020 2.943 2021 2.907 2022 2.873 2023 2.84 2024 2.808 2030 2.635 2040 2.406 2050 2.222 2070 1.983 2080 1.921 2099 1.869