Year Total
1800 6.23
1801 6.23
1802 6.23
1803 6.23
1804 6.23
1805 6.23
1806 6.23
1807 6.23
1808 6.23
1809 6.23
1810 6.23
1811 6.23
1812 6.23
1813 6.23
1814 6.23
1815 6.23
1816 6.23
1817 6.23
1818 6.23
1819 6.23
1820 6.23
1821 6.23
1822 6.23
1823 6.23
1824 6.23
1825 6.23
1826 6.23
1827 6.23
1828 6.23
1829 6.23
1830 6.23
1831 6.23
1832 6.23
1833 6.23
1834 6.23
1835 6.23
1836 6.23
1837 6.23
1838 6.23
1839 6.23
1840 6.23
1841 6.23
1842 6.23
1843 6.23
1844 6.23
1845 6.23
1846 6.23
1847 6.23
1848 6.23
1849 6.23
1850 6.23
1851 6.23
1852 6.23
1853 6.23
1854 6.23
1855 6.23
1856 6.23
1857 6.23
1858 6.23
1859 6.23
1860 6.23
1861 6.23
1862 6.23
1863 6.23
1864 6.23
1865 6.23
1866 6.23
1867 6.23
1868 6.23
1869 6.23
1870 6.23
1871 6.23
1872 6.23
1873 6.23
1874 6.23
1875 6.23
1876 6.23
1877 6.23
1878 6.23
1879 6.23
1880 6.23
1881 6.23
1882 6.23
1883 6.23
1884 6.23
1885 6.23
1886 6.23
1887 6.23
1888 6.23
1889 6.23
1890 6.23
1891 6.23
1892 6.23
1893 6.23
1894 6.23
1895 6.23
1896 6.23
1897 6.23
1898 6.23
1899 6.23
1900 6.23
1901 6.23
1902 6.23
1903 6.23
1904 6.23
1905 6.23
1906 6.23
1907 6.23
1908 6.23
1909 6.23
1910 6.23
1911 6.23
1912 6.23
1913 6.23
1914 6.23
1915 6.23
1916 6.23
1917 6.23
1918 6.23
1919 6.23
1920 6.23
1921 6.23
1922 6.23
1923 6.23
1924 6.23
1925 6.23
1926 6.23
1927 6.23
1928 6.23
1929 6.23
1930 6.23
1931 6.23
1932 6.23
1933 6.23
1934 6.23
1935 6.23
1936 6.23
1937 6.23
1938 6.23
1939 6.23
1940 6.23
1941 6.23
1942 6.23
1943 6.23
1944 6.23
1945 6.23
1946 6.23
1947 6.23
1948 6.23
1949 6.23
1950 6.23
1951 6.23
1952 6.24
1953 6.24
1954 6.24
1955 6.25
1956 6.25
1957 6.26
1958 6.27
1959 6.27
1960 6.28
1961 6.28
1962 6.28
1963 6.28
1964 6.27
1965 6.26
1966 6.24
1967 6.23
1968 6.21
1969 6.19
1970 6.16
1971 6.14
1972 6.11
1973 6.08
1974 6.04
1975 6
1976 5.95
1977 5.9
1978 5.84
1979 5.77
1980 5.69
1981 5.61
1982 5.52
1983 5.42
1984 5.31
1985 5.21
1986 5.11
1987 5.02
1988 4.93
1989 4.86
1990 4.8
1991 4.76
1992 4.72
1993 4.7
1994 4.68
1995 4.67
1996 4.65
1997 4.63
1998 4.6
1999 4.57
2000 4.53
2001 4.48
2002 4.42
2003 4.37
2004 4.32
2005 4.26
2006 4.21
2007 4.16
2008 4.1
2009 4.04
2010 3.99
2011 3.93
2012 3.87
2013 3.81
2014 3.76
2015 3.71
2016 3.66
2017 3.61
2018 3.56