Year Total
1800 6.35
1801 6.35
1802 6.35
1803 6.35
1804 6.35
1805 6.35
1806 6.35
1807 6.35
1808 6.35
1809 6.35
1810 6.35
1811 6.35
1812 6.35
1813 6.35
1814 6.35
1815 6.35
1816 6.35
1817 6.35
1818 6.35
1819 6.35
1820 6.35
1821 6.35
1822 6.35
1823 6.35
1824 6.35
1825 6.35
1826 6.35
1827 6.35
1828 6.35
1829 6.35
1830 6.35
1831 6.35
1832 6.35
1833 6.35
1834 6.35
1835 6.35
1836 6.35
1837 6.35
1838 6.35
1839 6.35
1840 6.35
1841 6.35
1842 6.35
1843 6.35
1844 6.35
1845 6.35
1846 6.35
1847 6.35
1848 6.35
1849 6.35
1850 6.35
1851 6.35
1852 6.35
1853 6.35
1854 6.35
1855 6.35
1856 6.35
1857 6.35
1858 6.35
1859 6.35
1860 6.35
1861 6.35
1862 6.35
1863 6.35
1864 6.35
1865 6.35
1866 6.35
1867 6.35
1868 6.35
1869 6.35
1870 6.35
1871 6.35
1872 6.35
1873 6.35
1874 6.35
1875 6.35
1876 6.35
1877 6.35
1878 6.35
1879 6.35
1880 6.35
1881 6.35
1882 6.35
1883 6.35
1884 6.35
1885 6.35
1886 6.35
1887 6.35
1888 6.35
1889 6.35
1890 6.35
1891 6.35
1892 6.35
1893 6.35
1894 6.35
1895 6.35
1896 6.35
1897 6.35
1898 6.35
1899 6.35
1900 6.35
1901 6.35
1902 6.35
1903 6.35
1904 6.35
1905 6.35
1906 6.35
1907 6.35
1908 6.35
1909 6.35
1910 6.35
1911 6.35
1912 6.35
1913 6.35
1914 6.35
1915 6.35
1916 6.35
1917 6.35
1918 6.35
1919 6.35
1920 6.35
1921 6.35
1922 6.35
1923 6.35
1924 6.35
1925 6.35
1926 6.34
1927 6.33
1928 6.32
1929 6.32
1930 6.31
1931 6.3
1932 6.29
1933 6.28
1934 6.27
1935 6.26
1936 6.25
1937 6.25
1938 6.24
1939 6.23
1940 6.22
1941 6.21
1942 6.2
1943 6.19
1944 6.18
1945 6.18
1946 6.17
1947 6.16
1948 6.15
1949 6.14
1950 6.13
1951 6.13
1952 6.14
1953 6.14
1954 6.14
1955 6.14
1956 6.14
1957 6.14
1958 6.14
1959 6.14
1960 6.15
1961 6.15
1962 6.16
1963 6.16
1964 6.15
1965 6.13
1966 6.08
1967 6.01
1968 5.9
1969 5.76
1970 5.6
1971 5.4
1972 5.18
1973 4.95
1974 4.72
1975 4.49
1976 4.26
1977 4.03
1978 3.81
1979 3.59
1980 3.39
1981 3.2
1982 3.02
1983 2.86
1984 2.71
1985 2.57
1986 2.45
1987 2.35
1988 2.26
1989 2.18
1990 2.11
1991 2.06
1992 2
1993 1.96
1994 1.91
1995 1.87
1996 1.82
1997 1.78
1998 1.74
1999 1.71
2000 1.67
2001 1.64
2002 1.62
2003 1.6
2004 1.58
2005 1.57
2006 1.56
2007 1.56
2008 1.55
2009 1.55
2010 1.55
2011 1.54
2012 1.53
2013 1.52
2014 1.51
2015 1.5
2016 1.48
2017 1.47
2018 1.45