Year Total
1800 5.71
1801 5.71
1802 5.71
1803 5.71
1804 5.71
1805 5.71
1806 5.71
1807 5.71
1808 5.71
1809 5.71
1810 5.71
1811 5.71
1812 5.71
1813 5.71
1814 5.71
1815 5.71
1816 5.71
1817 5.71
1818 5.71
1819 5.71
1820 5.71
1821 5.71
1822 5.71
1823 5.71
1824 5.71
1825 5.71
1826 5.71
1827 5.71
1828 5.71
1829 5.71
1830 5.71
1831 5.71
1832 5.71
1833 5.71
1834 5.71
1835 5.71
1836 5.71
1837 5.71
1838 5.71
1839 5.71
1840 5.71
1841 5.71
1842 5.71
1843 5.71
1844 5.71
1845 5.71
1846 5.71
1847 5.71
1848 5.71
1849 5.71
1850 5.71
1851 5.71
1852 5.71
1853 5.71
1854 5.71
1855 5.71
1856 5.71
1857 5.71
1858 5.71
1859 5.71
1860 5.71
1861 5.71
1862 5.71
1863 5.71
1864 5.71
1865 5.71
1866 5.71
1867 5.71
1868 5.71
1869 5.71
1870 5.71
1871 5.71
1872 5.71
1873 5.71
1874 5.71
1875 5.71
1876 5.71
1877 5.71
1878 5.71
1879 5.71
1880 5.71
1881 5.71
1882 5.71
1883 5.71
1884 5.71
1885 5.71
1886 5.71
1887 5.71
1888 5.71
1889 5.71
1890 5.71
1891 5.71
1892 5.71
1893 5.71
1894 5.71
1895 5.71
1896 5.71
1897 5.71
1898 5.71
1899 5.71
1900 5.71
1901 5.71
1902 5.71
1903 5.71
1904 5.71
1905 5.71
1906 5.71
1907 5.71
1908 5.71
1909 5.71
1910 5.71
1911 5.71
1912 5.71
1913 5.71
1914 5.71
1915 5.71
1916 5.71
1917 5.71
1918 5.71
1919 5.71
1920 5.71
1921 5.71
1922 5.71
1923 5.71
1924 5.71
1925 5.71
1926 5.71
1927 5.71
1928 5.71
1929 5.71
1930 5.71
1931 5.71
1932 5.71
1933 5.7
1934 5.7
1935 5.69
1936 5.69
1937 5.68
1938 5.67
1939 5.66
1940 5.64
1941 5.63
1942 5.61
1943 5.59
1944 5.58
1945 5.56
1946 5.53
1947 5.51
1948 5.49
1949 5.46
1950 5.43
1951 5.46
1952 5.55
1953 5.63
1954 5.72
1955 5.8
1956 5.89
1957 5.98
1958 6.07
1959 6.17
1960 6.26
1961 6.36
1962 6.44
1963 6.49
1964 6.52
1965 6.52
1966 6.5
1967 6.46
1968 6.42
1969 6.38
1970 6.33
1971 6.26
1972 6.19
1973 6.09
1974 5.97
1975 5.84
1976 5.7
1977 5.55
1978 5.4
1979 5.25
1980 5.11
1981 4.98
1982 4.87
1983 4.76
1984 4.67
1985 4.59
1986 4.51
1987 4.44
1988 4.37
1989 4.29
1990 4.21
1991 4.11
1992 3.99
1993 3.85
1994 3.7
1995 3.53
1996 3.36
1997 3.19
1998 3.03
1999 2.87
2000 2.74
2001 2.64
2002 2.56
2003 2.51
2004 2.48
2005 2.46
2006 2.46
2007 2.46
2008 2.46
2009 2.46
2010 2.44
2011 2.42
2012 2.4
2013 2.37
2014 2.34
2015 2.31
2016 2.29
2017 2.26
2018 2.23