Year Total
1800 6.64
1801 6.64
1802 6.64
1803 6.64
1804 6.64
1805 6.64
1806 6.64
1807 6.64
1808 6.64
1809 6.64
1810 6.64
1811 6.64
1812 6.64
1813 6.64
1814 6.64
1815 6.64
1816 6.64
1817 6.64
1818 6.64
1819 6.64
1820 6.64
1821 6.64
1822 6.64
1823 6.64
1824 6.64
1825 6.64
1826 6.64
1827 6.64
1828 6.64
1829 6.64
1830 6.64
1831 6.64
1832 6.64
1833 6.64
1834 6.64
1835 6.64
1836 6.64
1837 6.64
1838 6.64
1839 6.64
1840 6.64
1841 6.64
1842 6.64
1843 6.64
1844 6.64
1845 6.64
1846 6.64
1847 6.64
1848 6.64
1849 6.64
1850 6.64
1851 6.64
1852 6.64
1853 6.64
1854 6.64
1855 6.64
1856 6.64
1857 6.64
1858 6.64
1859 6.64
1860 6.64
1861 6.64
1862 6.64
1863 6.64
1864 6.64
1865 6.64
1866 6.64
1867 6.64
1868 6.64
1869 6.64
1870 6.64
1871 6.64
1872 6.64
1873 6.64
1874 6.64
1875 6.64
1876 6.64
1877 6.64
1878 6.64
1879 6.64
1880 6.64
1881 6.64
1882 6.64
1883 6.64
1884 6.64
1885 6.64
1886 6.64
1887 6.64
1888 6.64
1889 6.64
1890 6.64
1891 6.64
1892 6.64
1893 6.64
1894 6.64
1895 6.64
1896 6.64
1897 6.64
1898 6.64
1899 6.64
1900 6.64
1901 6.64
1902 6.64
1903 6.64
1904 6.64
1905 6.64
1906 6.64
1907 6.64
1908 6.64
1909 6.64
1910 6.64
1911 6.64
1912 6.64
1913 6.64
1914 6.64
1915 6.64
1916 6.64
1917 6.64
1918 6.64
1919 6.64
1920 6.64
1921 6.64
1922 6.64
1923 6.64
1924 6.64
1925 6.64
1926 6.64
1927 6.64
1928 6.64
1929 6.65
1930 6.65
1931 6.65
1932 6.65
1933 6.65
1934 6.65
1935 6.65
1936 6.66
1937 6.66
1938 6.66
1939 6.66
1940 6.66
1941 6.66
1942 6.66
1943 6.67
1944 6.67
1945 6.67
1946 6.67
1947 6.67
1948 6.67
1949 6.67
1950 6.68
1951 6.67
1952 6.65
1953 6.64
1954 6.64
1955 6.63
1956 6.64
1957 6.65
1958 6.66
1959 6.67
1960 6.69
1961 6.71
1962 6.74
1963 6.76
1964 6.79
1965 6.81
1966 6.83
1967 6.85
1968 6.87
1969 6.88
1970 6.89
1971 6.9
1972 6.91
1973 6.92
1974 6.93
1975 6.94
1976 6.93
1977 6.92
1978 6.89
1979 6.85
1980 6.8
1981 6.74
1982 6.67
1983 6.61
1984 6.54
1985 6.47
1986 6.4
1987 6.34
1988 6.27
1989 6.21
1990 6.15
1991 6.09
1992 6.03
1993 5.96
1994 5.9
1995 5.83
1996 5.76
1997 5.68
1998 5.61
1999 5.54
2000 5.47
2001 5.4
2002 5.33
2003 5.27
2004 5.2
2005 5.14
2006 5.09
2007 5.03
2008 4.98
2009 4.93
2010 4.88
2011 4.83
2012 4.77
2013 4.72
2014 4.66
2015 4.6
2016 4.53
2017 4.47
2018 4.41