Year Total 1800 6.63 1801 6.63 1802 6.63 1803 6.63 1804 6.63 1805 6.63 1806 6.63 1807 6.63 1808 6.63 1809 6.63 1810 6.63 1811 6.63 1812 6.63 1813 6.63 1814 6.63 1815 6.63 1816 6.63 1817 6.63 1818 6.63 1819 6.63 1820 6.63 1821 6.63 1822 6.63 1823 6.63 1824 6.63 1825 6.63 1826 6.63 1827 6.63 1828 6.63 1829 6.63 1830 6.63 1831 6.63 1832 6.63 1833 6.63 1834 6.63 1835 6.63 1836 6.63 1837 6.63 1838 6.63 1839 6.63 1840 6.63 1841 6.63 1842 6.63 1843 6.63 1844 6.63 1845 6.63 1846 6.63 1847 6.63 1848 6.63 1849 6.63 1850 6.63 1851 6.63 1852 6.63 1853 6.63 1854 6.63 1855 6.63 1856 6.63 1857 6.63 1858 6.63 1859 6.63 1860 6.63 1861 6.63 1862 6.63 1863 6.63 1864 6.63 1865 6.63 1866 6.63 1867 6.63 1868 6.63 1869 6.63 1870 6.63 1871 6.63 1872 6.63 1873 6.63 1874 6.63 1875 6.63 1876 6.63 1877 6.63 1878 6.63 1879 6.63 1880 6.63 1881 6.63 1882 6.63 1883 6.63 1884 6.63 1885 6.63 1886 6.63 1887 6.63 1888 6.63 1889 6.63 1890 6.63 1891 6.63 1892 6.63 1893 6.63 1894 6.63 1895 6.63 1896 6.63 1897 6.63 1898 6.63 1899 6.63 1900 6.63 1901 6.63 1902 6.63 1903 6.63 1904 6.63 1905 6.63 1906 6.63 1907 6.63 1908 6.63 1909 6.63 1910 6.63 1911 6.63 1912 6.63 1913 6.63 1914 6.63 1915 6.63 1916 6.63 1917 6.63 1918 6.63 1919 6.63 1920 6.63 1921 6.63 1922 6.63 1923 6.63 1924 6.63 1925 6.63 1926 6.63 1927 6.63 1928 6.63 1929 6.63 1930 6.62 1931 6.62 1932 6.62 1933 6.62 1934 6.63 1935 6.63 1936 6.63 1937 6.64 1938 6.64 1939 6.65 1940 6.65 1941 6.66 1942 6.67 1943 6.68 1944 6.69 1945 6.7 1946 6.71 1947 6.72 1948 6.74 1949 6.75 1950 6.77 1951 6.79 1952 6.81 1953 6.84 1954 6.87 1955 6.89 1956 6.91 1957 6.93 1958 6.94 1959 6.95 1960 6.95 1961 6.94 1962 6.92 1963 6.9 1964 6.88 1965 6.87 1966 6.86 1967 6.86 1968 6.85 1969 6.85 1970 6.84 1971 6.82 1972 6.8 1973 6.77 1974 6.73 1975 6.68 1976 6.63 1977 6.59 1978 6.54 1979 6.5 1980 6.46 1981 6.44 1982 6.41 1983 6.39 1984 6.37 1985 6.35 1986 6.33 1987 6.31 1988 6.28 1989 6.25 1990 6.21 1991 6.17 1992 6.12 1993 6.07 1994 6.02 1995 5.96 1996 5.92 1997 5.88 1998 5.85 1999 5.83 2000 5.82 2001 5.81 2002 5.8 2003 5.78 2004 5.76 2005 5.74 2006 5.71 2007 5.67 2008 5.64 2009 5.6 2010 5.56 2011 5.52 2012 5.47 2013 5.42 2014 5.37 2015 5.31 2016 5.24 2017 5.18 2018 5.12