Year Total
1800 6.55
1801 6.55
1802 6.55
1803 6.55
1804 6.55
1805 6.55
1806 6.55
1807 6.55
1808 6.55
1809 6.55
1810 6.55
1811 6.55
1812 6.55
1813 6.55
1814 6.55
1815 6.55
1816 6.55
1817 6.55
1818 6.55
1819 6.55
1820 6.55
1821 6.55
1822 6.55
1823 6.55
1824 6.55
1825 6.55
1826 6.55
1827 6.55
1828 6.55
1829 6.55
1830 6.55
1831 6.55
1832 6.55
1833 6.55
1834 6.55
1835 6.55
1836 6.55
1837 6.55
1838 6.55
1839 6.55
1840 6.55
1841 6.55
1842 6.55
1843 6.55
1844 6.55
1845 6.55
1846 6.55
1847 6.55
1848 6.55
1849 6.55
1850 6.55
1851 6.55
1852 6.55
1853 6.55
1854 6.55
1855 6.55
1856 6.55
1857 6.55
1858 6.55
1859 6.55
1860 6.55
1861 6.55
1862 6.55
1863 6.55
1864 6.55
1865 6.55
1866 6.55
1867 6.55
1868 6.55
1869 6.55
1870 6.55
1871 6.55
1872 6.55
1873 6.55
1874 6.55
1875 6.55
1876 6.55
1877 6.55
1878 6.55
1879 6.55
1880 6.55
1881 6.55
1882 6.55
1883 6.55
1884 6.55
1885 6.55
1886 6.55
1887 6.55
1888 6.55
1889 6.55
1890 6.55
1891 6.55
1892 6.55
1893 6.55
1894 6.55
1895 6.55
1896 6.55
1897 6.55
1898 6.55
1899 6.55
1900 6.55
1901 6.55
1902 6.55
1903 6.55
1904 6.55
1905 6.55
1906 6.55
1907 6.55
1908 6.55
1909 6.55
1910 6.55
1911 6.55
1912 6.55
1913 6.55
1914 6.55
1915 6.55
1916 6.55
1917 6.55
1918 6.55
1919 6.55
1920 6.55
1921 6.55
1922 6.55
1923 6.55
1924 6.55
1925 6.55
1926 6.54
1927 6.53
1928 6.53
1929 6.52
1930 6.51
1931 6.5
1932 6.5
1933 6.49
1934 6.48
1935 6.47
1936 6.47
1937 6.46
1938 6.45
1939 6.44
1940 6.43
1941 6.43
1942 6.42
1943 6.41
1944 6.4
1945 6.4
1946 6.39
1947 6.38
1948 6.37
1949 6.36
1950 6.36
1951 6.36
1952 6.35
1953 6.35
1954 6.35
1955 6.35
1956 6.35
1957 6.35
1958 6.36
1959 6.36
1960 6.35
1961 6.35
1962 6.35
1963 6.34
1964 6.34
1965 6.34
1966 6.34
1967 6.36
1968 6.39
1969 6.43
1970 6.47
1971 6.52
1972 6.58
1973 6.63
1974 6.67
1975 6.71
1976 6.74
1977 6.76
1978 6.77
1979 6.78
1980 6.78
1981 6.78
1982 6.77
1983 6.75
1984 6.73
1985 6.7
1986 6.66
1987 6.63
1988 6.58
1989 6.54
1990 6.49
1991 6.44
1992 6.4
1993 6.35
1994 6.3
1995 6.26
1996 6.22
1997 6.19
1998 6.16
1999 6.13
2000 6.11
2001 6.08
2002 6.06
2003 6.04
2004 6.01
2005 5.99
2006 5.96
2007 5.93
2008 5.9
2009 5.87
2010 5.84
2011 5.8
2012 5.76
2013 5.71
2014 5.65
2015 5.59
2016 5.53
2017 5.46
2018 5.39