Year Total
1800 5.72
1801 5.72
1802 5.72
1803 5.72
1804 5.72
1805 5.72
1806 5.72
1807 5.72
1808 5.72
1809 5.72
1810 5.72
1811 5.72
1812 5.72
1813 5.72
1814 5.72
1815 5.72
1816 5.72
1817 5.72
1818 5.72
1819 5.72
1820 5.72
1821 5.72
1822 5.72
1823 5.72
1824 5.72
1825 5.72
1826 5.72
1827 5.72
1828 5.72
1829 5.72
1830 5.72
1831 5.72
1832 5.72
1833 5.72
1834 5.72
1835 5.72
1836 5.72
1837 5.72
1838 5.72
1839 5.72
1840 5.72
1841 5.72
1842 5.72
1843 5.72
1844 5.72
1845 5.72
1846 5.72
1847 5.72
1848 5.72
1849 5.72
1850 5.72
1851 5.72
1852 5.72
1853 5.72
1854 5.72
1855 5.72
1856 5.72
1857 5.72
1858 5.72
1859 5.72
1860 5.72
1861 5.72
1862 5.72
1863 5.72
1864 5.72
1865 5.72
1866 5.72
1867 5.72
1868 5.72
1869 5.72
1870 5.72
1871 5.72
1872 5.72
1873 5.72
1874 5.72
1875 5.72
1876 5.72
1877 5.72
1878 5.72
1879 5.72
1880 5.72
1881 5.72
1882 5.72
1883 5.72
1884 5.72
1885 5.72
1886 5.72
1887 5.72
1888 5.72
1889 5.72
1890 5.72
1891 5.72
1892 5.72
1893 5.72
1894 5.72
1895 5.72
1896 5.72
1897 5.72
1898 5.72
1899 5.72
1900 5.72
1901 5.72
1902 5.72
1903 5.72
1904 5.72
1905 5.72
1906 5.72
1907 5.72
1908 5.72
1909 5.72
1910 5.72
1911 5.72
1912 5.72
1913 5.72
1914 5.72
1915 5.72
1916 5.72
1917 5.72
1918 5.72
1919 5.72
1920 5.72
1921 5.72
1922 5.72
1923 5.72
1924 5.72
1925 5.72
1926 5.72
1927 5.72
1928 5.72
1929 5.72
1930 5.72
1931 5.72
1932 5.73
1933 5.73
1934 5.73
1935 5.73
1936 5.74
1937 5.74
1938 5.75
1939 5.76
1940 5.76
1941 5.77
1942 5.78
1943 5.79
1944 5.8
1945 5.82
1946 5.83
1947 5.84
1948 5.86
1949 5.87
1950 5.89
1951 5.9
1952 5.9
1953 5.91
1954 5.92
1955 5.94
1956 5.96
1957 6
1958 6.03
1959 6.08
1960 6.13
1961 6.17
1962 6.22
1963 6.26
1964 6.3
1965 6.34
1966 6.37
1967 6.4
1968 6.43
1969 6.47
1970 6.5
1971 6.52
1972 6.55
1973 6.57
1974 6.59
1975 6.61
1976 6.63
1977 6.64
1978 6.66
1979 6.68
1980 6.69
1981 6.7
1982 6.72
1983 6.72
1984 6.73
1985 6.73
1986 6.73
1987 6.73
1988 6.73
1989 6.73
1990 6.72
1991 6.71
1992 6.7
1993 6.67
1994 6.65
1995 6.61
1996 6.56
1997 6.51
1998 6.46
1999 6.39
2000 6.32
2001 6.24
2002 6.16
2003 6.07
2004 5.97
2005 5.86
2006 5.75
2007 5.62
2008 5.49
2009 5.35
2010 5.2
2011 5.06
2012 4.92
2013 4.79
2014 4.67
2015 4.56
2016 4.46
2017 4.36
2018 4.26