Year Total
1800 6.07
1801 6.07
1802 6.07
1803 6.07
1804 6.07
1805 6.07
1806 6.07
1807 6.07
1808 6.07
1809 6.07
1810 6.07
1811 6.07
1812 6.07
1813 6.07
1814 6.07
1815 6.07
1816 6.07
1817 6.07
1818 6.07
1819 6.07
1820 6.07
1821 6.07
1822 6.07
1823 6.07
1824 6.07
1825 6.07
1826 6.07
1827 6.07
1828 6.07
1829 6.07
1830 6.07
1831 6.07
1832 6.07
1833 6.07
1834 6.07
1835 6.07
1836 6.07
1837 6.07
1838 6.07
1839 6.07
1840 6.07
1841 6.07
1842 6.07
1843 6.07
1844 6.07
1845 6.07
1846 6.07
1847 6.07
1848 6.07
1849 6.07
1850 6.07
1851 6.07
1852 6.07
1853 6.07
1854 6.07
1855 6.07
1856 6.07
1857 6.07
1858 6.07
1859 6.07
1860 6.07
1861 6.07
1862 6.07
1863 6.07
1864 6.07
1865 6.07
1866 6.07
1867 6.07
1868 6.07
1869 6.07
1870 6.07
1871 6.07
1872 6.07
1873 6.07
1874 6.07
1875 6.07
1876 6.07
1877 6.07
1878 6.07
1879 6.07
1880 6.07
1881 6.07
1882 6.07
1883 6.07
1884 6.07
1885 6.07
1886 6.07
1887 6.07
1888 6.07
1889 6.07
1890 6.07
1891 6.07
1892 6.07
1893 6.07
1894 6.07
1895 6.07
1896 6.07
1897 6.06
1898 6.06
1899 6.05
1900 6.05
1901 6.04
1902 6.04
1903 6.03
1904 5.99
1905 5.95
1906 6.06
1907 6.26
1908 6.23
1909 6.2
1910 6.17
1911 6.14
1912 6.11
1913 6.08
1914 5.84
1915 5.72
1916 5.59
1917 5.46
1918 5.34
1919 5.21
1920 5.48
1921 5.48
1922 5.47
1923 5.47
1924 5.46
1925 5.46
1926 5.45
1927 5.45
1928 5.44
1929 5.44
1930 5.44
1931 5.43
1932 5.43
1933 5.42
1934 5.42
1935 5.41
1936 5.41
1937 5.4
1938 5.4
1939 5.4
1940 5.39
1941 5.39
1942 5.38
1943 5.38
1944 5.37
1945 5.37
1946 5.36
1947 5.36
1948 5.35
1949 5.35
1950 5.35
1951 5.39
1952 5.46
1953 5.53
1954 5.58
1955 5.62
1956 5.65
1957 5.67
1958 5.67
1959 5.67
1960 5.67
1961 5.66
1962 5.65
1963 5.63
1964 5.62
1965 5.61
1966 5.6
1967 5.58
1968 5.56
1969 5.52
1970 5.47
1971 5.41
1972 5.34
1973 5.25
1974 5.15
1975 5.04
1976 4.93
1977 4.81
1978 4.68
1979 4.56
1980 4.43
1981 4.3
1982 4.17
1983 4.03
1984 3.89
1985 3.75
1986 3.61
1987 3.47
1988 3.35
1989 3.23
1990 3.12
1991 3.02
1992 2.93
1993 2.84
1994 2.76
1995 2.69
1996 2.63
1997 2.58
1998 2.54
1999 2.52
2000 2.51
2001 2.51
2002 2.51
2003 2.51
2004 2.52
2005 2.51
2006 2.51
2007 2.51
2008 2.5
2009 2.49
2010 2.48
2011 2.47
2012 2.46
2013 2.44
2014 2.41
2015 2.39
2016 2.36
2017 2.34
2018 2.31