Year Total
1800 5.53
1801 5.53
1802 5.53
1803 5.53
1804 5.53
1805 5.53
1806 5.53
1807 5.53
1808 5.53
1809 5.53
1810 5.53
1811 5.53
1812 5.53
1813 5.53
1814 5.53
1815 5.53
1816 5.53
1817 5.53
1818 5.53
1819 5.53
1820 5.53
1821 5.53
1822 5.53
1823 5.53
1824 5.53
1825 5.53
1826 5.53
1827 5.53
1828 5.53
1829 5.53
1830 5.53
1831 5.53
1832 5.53
1833 5.53
1834 5.53
1835 5.53
1836 5.53
1837 5.53
1838 5.53
1839 5.53
1840 5.53
1841 5.53
1842 5.53
1843 5.53
1844 5.53
1845 5.53
1846 5.53
1847 5.53
1848 5.53
1849 5.53
1850 5.53
1851 5.53
1852 5.53
1853 5.53
1854 5.53
1855 5.53
1856 5.53
1857 5.53
1858 5.53
1859 5.53
1860 5.53
1861 5.53
1862 5.53
1863 5.53
1864 5.53
1865 5.53
1866 5.53
1867 5.53
1868 5.53
1869 5.53
1870 5.53
1871 5.53
1872 5.53
1873 5.53
1874 5.53
1875 5.53
1876 5.53
1877 5.53
1878 5.53
1879 5.53
1880 5.53
1881 5.53
1882 5.53
1883 5.53
1884 5.53
1885 5.53
1886 5.53
1887 5.53
1888 5.53
1889 5.53
1890 5.53
1891 5.53
1892 5.53
1893 5.53
1894 5.53
1895 5.53
1896 5.53
1897 5.53
1898 5.53
1899 5.53
1900 5.53
1901 5.53
1902 5.53
1903 5.53
1904 5.53
1905 5.53
1906 5.53
1907 5.53
1908 5.53
1909 5.53
1910 5.53
1911 5.53
1912 5.53
1913 5.53
1914 5.53
1915 5.53
1916 5.53
1917 5.53
1918 5.53
1919 5.53
1920 5.53
1921 5.53
1922 5.53
1923 5.53
1924 5.53
1925 5.53
1926 5.52
1927 5.51
1928 5.51
1929 5.5
1930 5.49
1931 5.48
1932 5.48
1933 5.47
1934 5.46
1935 5.45
1936 5.45
1937 5.44
1938 5.43
1939 5.42
1940 5.41
1941 5.41
1942 5.4
1943 5.39
1944 5.38
1945 5.38
1946 5.37
1947 5.36
1948 5.35
1949 5.35
1950 5.34
1951 5.53
1952 5.89
1953 6.19
1954 6.45
1955 6.65
1956 6.8
1957 6.9
1958 6.96
1959 6.98
1960 6.97
1961 6.93
1962 6.88
1963 6.82
1964 6.76
1965 6.69
1966 6.61
1967 6.51
1968 6.39
1969 6.25
1970 6.1
1971 5.95
1972 5.81
1973 5.69
1974 5.57
1975 5.46
1976 5.35
1977 5.22
1978 5.06
1979 4.89
1980 4.7
1981 4.51
1982 4.33
1983 4.16
1984 4.01
1985 3.89
1986 3.78
1987 3.68
1988 3.59
1989 3.5
1990 3.4
1991 3.3
1992 3.2
1993 3.1
1994 3
1995 2.89
1996 2.77
1997 2.64
1998 2.5
1999 2.35
2000 2.2
2001 2.06
2002 1.93
2003 1.83
2004 1.74
2005 1.68
2006 1.63
2007 1.6
2008 1.57
2009 1.56
2010 1.54
2011 1.52
2012 1.51
2013 1.5
2014 1.48
2015 1.47
2016 1.46
2017 1.45
2018 1.44