Year Total
1800 6.26
1801 6.26
1802 6.26
1803 6.26
1804 6.26
1805 6.26
1806 6.26
1807 6.26
1808 6.26
1809 6.26
1810 6.26
1811 6.26
1812 6.26
1813 6.26
1814 6.26
1815 6.26
1816 6.26
1817 6.26
1818 6.26
1819 6.26
1820 6.26
1821 6.26
1822 6.26
1823 6.26
1824 6.26
1825 6.26
1826 6.26
1827 6.26
1828 6.26
1829 6.26
1830 6.26
1831 6.26
1832 6.26
1833 6.26
1834 6.26
1835 6.26
1836 6.26
1837 6.26
1838 6.26
1839 6.26
1840 6.26
1841 6.26
1842 6.26
1843 6.26
1844 6.26
1845 6.26
1846 6.26
1847 6.26
1848 6.26
1849 6.26
1850 6.26
1851 6.26
1852 6.26
1853 6.26
1854 6.26
1855 6.26
1856 6.26
1857 6.26
1858 6.26
1859 6.26
1860 6.26
1861 6.26
1862 6.26
1863 6.26
1864 6.26
1865 6.26
1866 6.26
1867 6.26
1868 6.26
1869 6.26
1870 6.26
1871 6.26
1872 6.26
1873 6.26
1874 6.26
1875 6.26
1876 6.27
1877 6.27
1878 6.28
1879 6.29
1880 6.29
1881 6.3
1882 6.29
1883 6.28
1884 6.27
1885 6.26
1886 6.25
1887 6.24
1888 6.23
1889 6.22
1890 6.21
1891 6.2
1892 6.19
1893 6.18
1894 6.17
1895 6.16
1896 6.11
1897 6.05
1898 5.99
1899 5.93
1900 5.88
1901 5.82
1902 5.76
1903 5.78
1904 5.8
1905 5.81
1906 5.83
1907 5.85
1908 5.86
1909 5.88
1910 5.9
1911 5.9
1912 5.9
1913 5.9
1914 5.9
1915 5.9
1916 5.9
1917 5.9
1918 5.9
1919 5.9
1920 5.9
1921 5.9
1922 5.9
1923 5.9
1924 5.9
1925 5.9
1926 5.9
1927 5.9
1928 5.9
1929 5.9
1930 5.9
1931 5.9
1932 5.9
1933 5.9
1934 5.9
1935 5.9
1936 5.9
1937 5.9
1938 5.9
1939 5.9
1940 5.9
1941 5.92
1942 5.95
1943 5.98
1944 6.01
1945 6.04
1946 6.07
1947 6.09
1948 6.12
1949 6.15
1950 6.18
1951 6.17
1952 6.15
1953 6.14
1954 6.14
1955 6.14
1956 6.16
1957 6.18
1958 6.2
1959 6.21
1960 6.21
1961 6.19
1962 6.14
1963 6.06
1964 5.95
1965 5.82
1966 5.66
1967 5.49
1968 5.33
1969 5.17
1970 5.02
1971 4.9
1972 4.78
1973 4.68
1974 4.59
1975 4.5
1976 4.42
1977 4.34
1978 4.26
1979 4.17
1980 4.07
1981 3.97
1982 3.85
1983 3.72
1984 3.59
1985 3.45
1986 3.31
1987 3.17
1988 3.04
1989 2.92
1990 2.81
1991 2.72
1992 2.64
1993 2.58
1994 2.54
1995 2.5
1996 2.49
1997 2.46
1998 2.43
1999 2.37
2000 2.3
2001 2.23
2002 2.16
2003 2.1
2004 2.03
2005 1.98
2006 1.93
2007 1.88
2008 1.85
2009 1.82
2010 1.81
2011 1.79
2012 1.78
2013 1.77
2014 1.75
2015 1.74
2016 1.73
2017 1.71
2018 1.7