Year Total 1800 5.99 1801 5.99 1802 5.99 1803 5.99 1804 5.99 1805 5.99 1806 5.99 1807 5.99 1808 5.99 1809 5.99 1810 5.99 1811 5.99 1812 5.99 1813 5.99 1814 5.99 1815 5.99 1816 5.99 1817 5.99 1818 5.99 1819 5.99 1820 5.99 1821 5.99 1822 5.99 1823 5.99 1824 5.99 1825 5.99 1826 5.99 1827 5.99 1828 5.99 1829 5.99 1830 5.99 1831 5.99 1832 5.99 1833 5.99 1834 5.99 1835 5.99 1836 5.99 1837 5.99 1838 5.99 1839 5.99 1840 5.99 1841 5.99 1842 5.99 1843 5.99 1844 5.99 1845 5.99 1846 5.99 1847 5.99 1848 5.99 1849 5.99 1850 5.99 1851 5.99 1852 5.99 1853 5.99 1854 5.99 1855 5.99 1856 5.99 1857 5.99 1858 5.99 1859 5.99 1860 5.99 1861 5.99 1862 5.99 1863 5.99 1864 5.99 1865 5.99 1866 5.99 1867 5.99 1868 5.99 1869 5.99 1870 5.99 1871 5.99 1872 5.99 1873 5.99 1874 5.99 1875 5.99 1876 5.99 1877 5.99 1878 5.99 1879 5.99 1880 5.99 1881 5.99 1882 5.99 1883 5.99 1884 5.99 1885 5.99 1886 5.99 1887 5.99 1888 5.99 1889 5.99 1890 5.99 1891 5.99 1892 5.99 1893 5.99 1894 5.99 1895 5.99 1896 5.99 1897 5.99 1898 5.99 1899 5.99 1900 5.99 1901 5.99 1902 5.99 1903 5.99 1904 5.99 1905 5.99 1906 5.99 1907 5.99 1908 5.99 1909 5.99 1910 5.99 1911 5.99 1912 5.99 1913 5.99 1914 5.99 1915 5.99 1916 5.99 1917 5.99 1918 5.99 1919 5.99 1920 5.99 1921 5.99 1922 5.99 1923 5.99 1924 5.99 1925 5.99 1926 5.99 1927 5.99 1928 5.99 1929 5.99 1930 5.99 1931 5.99 1932 5.99 1933 5.99 1934 5.99 1935 5.99 1936 5.99 1937 5.99 1938 5.99 1939 5.99 1940 5.99 1941 5.99 1942 5.99 1943 5.99 1944 5.99 1945 5.99 1946 5.99 1947 5.99 1948 5.99 1949 5.99 1950 5.99 1951 5.99 1952 5.98 1953 5.98 1954 5.97 1955 5.97 1956 5.97 1957 5.98 1958 5.98 1959 5.99 1960 6 1961 6.02 1962 6.03 1963 6.05 1964 6.07 1965 6.09 1966 6.11 1967 6.14 1968 6.16 1969 6.19 1970 6.21 1971 6.24 1972 6.27 1973 6.3 1974 6.33 1975 6.37 1976 6.4 1977 6.44 1978 6.49 1979 6.54 1980 6.59 1981 6.64 1982 6.69 1983 6.74 1984 6.79 1985 6.85 1986 6.9 1987 6.96 1988 7.02 1989 7.08 1990 7.13 1991 7.17 1992 7.19 1993 7.2 1994 7.19 1995 7.18 1996 7.15 1997 7.11 1998 7.06 1999 7.02 2000 6.96 2001 6.91 2002 6.86 2003 6.81 2004 6.76 2005 6.71 2006 6.66 2007 6.61 2008 6.57 2009 6.52 2010 6.47 2011 6.42 2012 6.36 2013 6.3 2014 6.24 2015 6.17 2016 6.09 2017 6.02 2018 5.92