Year Total 1800 5.36 1801 5.36 1802 5.36 1803 5.36 1804 5.36 1805 5.36 1806 5.36 1807 5.36 1808 5.36 1809 5.36 1810 5.36 1811 5.36 1812 5.36 1813 5.36 1814 5.36 1815 5.36 1816 5.36 1817 5.36 1818 5.36 1819 5.36 1820 5.36 1821 5.36 1822 5.36 1823 5.36 1824 5.36 1825 5.36 1826 5.36 1827 5.36 1828 5.36 1829 5.36 1830 5.36 1831 5.36 1832 5.36 1833 5.36 1834 5.36 1835 5.36 1836 5.36 1837 5.36 1838 5.36 1839 5.36 1840 5.36 1841 5.36 1842 5.36 1843 5.36 1844 5.36 1845 5.36 1846 5.36 1847 5.36 1848 5.36 1849 5.36 1850 5.36 1851 5.36 1852 5.36 1853 5.36 1854 5.36 1855 5.36 1856 5.36 1857 5.36 1858 5.36 1859 5.36 1860 5.36 1861 5.36 1862 5.36 1863 5.36 1864 5.36 1865 5.36 1866 5.36 1867 5.36 1868 5.36 1869 5.36 1870 5.36 1871 5.36 1872 5.36 1873 5.36 1874 5.36 1875 5.36 1876 5.36 1877 5.36 1878 5.36 1879 5.36 1880 5.36 1881 5.36 1882 5.36 1883 5.36 1884 5.36 1885 5.36 1886 5.36 1887 5.36 1888 5.36 1889 5.36 1890 5.36 1891 5.36 1892 5.36 1893 5.36 1894 5.36 1895 5.36 1896 5.36 1897 5.36 1898 5.36 1899 5.36 1900 5.36 1901 5.38 1902 5.4 1903 5.398 1904 5.395 1905 5.392 1906 5.389 1907 5.387 1908 5.435 1909 5.483 1910 5.532 1911 5.58 1912 5.628 1913 5.502 1914 5.376 1915 5.25 1916 5.124 1917 4.998 1918 5.071 1919 5.143 1920 5.215 1921 5.288 1922 5.36 1923 5.333 1924 5.306 1925 5.28 1926 5.253 1927 5.226 1928 5.183 1929 5.14 1930 5.097 1931 5.054 1932 5.012 1933 5.022 1934 5.033 1935 5.044 1936 5.054 1937 5.065 1938 5.111 1939 5.156 1940 5.202 1941 5.247 1942 5.293 1943 5.307 1944 5.321 1945 5.334 1946 5.348 1947 5.362 1948 5.468 1949 5.573 1950 5.679 1951 5.704 1952 5.749 1953 5.789 1954 5.821 1955 5.848 1956 5.868 1957 5.88 1958 5.885 1959 5.882 1960 5.87 1961 5.846 1962 5.812 1963 5.765 1964 5.707 1965 5.638 1966 5.559 1967 5.472 1968 5.378 1969 5.279 1970 5.173 1971 5.06 1972 4.939 1973 4.81 1974 4.675 1975 4.537 1976 4.398 1977 4.26 1978 4.128 1979 4.002 1980 3.884 1981 3.775 1982 3.673 1983 3.579 1984 3.492 1985 3.41 1986 3.334 1987 3.262 1988 3.195 1989 3.132 1990 3.075 1991 3.024 1992 2.982 1993 2.948 1994 2.921 1995 2.901 1996 2.884 1997 2.87 1998 2.855 1999 2.839 2000 2.821 2001 2.799 2002 2.775 2003 2.75 2004 2.724 2005 2.696 2006 2.667 2007 2.637 2008 2.608 2009 2.578 2010 2.549 2011 2.521 2012 2.493 2013 2.466 2014 2.441 2015 2.416 2016 2.392 2017 2.369 2018 2.347 2019 2.326 2020 2.305 2021 2.285 2022 2.265 2023 2.246 2024 2.227 2030 2.124 2040 1.998 2050 1.922 2070 1.865 2080 1.859 2099 1.866