Year Total
1800 6.74
1801 6.74
1802 6.74
1803 6.74
1804 6.74
1805 6.74
1806 6.74
1807 6.74
1808 6.74
1809 6.74
1810 6.74
1811 6.74
1812 6.74
1813 6.74
1814 6.74
1815 6.74
1816 6.74
1817 6.74
1818 6.74
1819 6.74
1820 6.74
1821 6.74
1822 6.74
1823 6.74
1824 6.74
1825 6.74
1826 6.74
1827 6.74
1828 6.74
1829 6.74
1830 6.74
1831 6.74
1832 6.74
1833 6.74
1834 6.74
1835 6.74
1836 6.74
1837 6.74
1838 6.74
1839 6.74
1840 6.74
1841 6.74
1842 6.74
1843 6.74
1844 6.74
1845 6.74
1846 6.74
1847 6.74
1848 6.74
1849 6.74
1850 6.74
1851 6.74
1852 6.74
1853 6.74
1854 6.74
1855 6.74
1856 6.74
1857 6.74
1858 6.74
1859 6.74
1860 6.74
1861 6.74
1862 6.74
1863 6.74
1864 6.74
1865 6.74
1866 6.74
1867 6.74
1868 6.74
1869 6.74
1870 6.74
1871 6.74
1872 6.74
1873 6.74
1874 6.74
1875 6.74
1876 6.74
1877 6.74
1878 6.74
1879 6.74
1880 6.74
1881 6.74
1882 6.74
1883 6.74
1884 6.74
1885 6.74
1886 6.74
1887 6.74
1888 6.74
1889 6.74
1890 6.74
1891 6.74
1892 6.74
1893 6.74
1894 6.74
1895 6.74
1896 6.74
1897 6.74
1898 6.74
1899 6.74
1900 6.74
1901 6.74
1902 6.74
1903 6.74
1904 6.74
1905 6.74
1906 6.74
1907 6.74
1908 6.74
1909 6.74
1910 6.74
1911 6.74
1912 6.74
1913 6.74
1914 6.74
1915 6.74
1916 6.74
1917 6.74
1918 6.74
1919 6.74
1920 6.74
1921 6.74
1922 6.74
1923 6.74
1924 6.74
1925 6.74
1926 6.74
1927 6.74
1928 6.74
1929 6.73
1930 6.73
1931 6.73
1932 6.73
1933 6.73
1934 6.73
1935 6.72
1936 6.72
1937 6.72
1938 6.72
1939 6.72
1940 6.72
1941 6.71
1942 6.71
1943 6.71
1944 6.71
1945 6.71
1946 6.71
1947 6.7
1948 6.7
1949 6.7
1950 6.7
1951 6.71
1952 6.73
1953 6.75
1954 6.77
1955 6.78
1956 6.79
1957 6.8
1958 6.8
1959 6.81
1960 6.81
1961 6.81
1962 6.8
1963 6.8
1964 6.8
1965 6.8
1966 6.8
1967 6.79
1968 6.79
1969 6.78
1970 6.77
1971 6.77
1972 6.76
1973 6.76
1974 6.76
1975 6.75
1976 6.74
1977 6.73
1978 6.71
1979 6.69
1980 6.65
1981 6.62
1982 6.58
1983 6.54
1984 6.5
1985 6.47
1986 6.42
1987 6.38
1988 6.33
1989 6.27
1990 6.21
1991 6.15
1992 6.08
1993 6.01
1994 5.95
1995 5.88
1996 5.83
1997 5.78
1998 5.74
1999 5.71
2000 5.69
2001 5.68
2002 5.67
2003 5.66
2004 5.65
2005 5.64
2006 5.62
2007 5.58
2008 5.54
2009 5.49
2010 5.43
2011 5.36
2012 5.29
2013 5.22
2014 5.15
2015 5.08
2016 5.02
2017 4.95
2018 4.89