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 6.24
1927 6.24
1928 6.25
1929 6.26
1930 6.26
1931 6.27
1932 6.28
1933 6.29
1934 6.3
1935 6.31
1936 6.33
1937 6.34
1938 6.36
1939 6.38
1940 6.39
1941 6.41
1942 6.44
1943 6.46
1944 6.48
1945 6.51
1946 6.53
1947 6.56
1948 6.59
1949 6.62
1950 6.65
1951 6.68
1952 6.73
1953 6.76
1954 6.8
1955 6.83
1956 6.86
1957 6.89
1958 6.91
1959 6.94
1960 6.97
1961 6.98
1962 6.99
1963 7.01
1964 7.03
1965 7.05
1966 7.07
1967 7.09
1968 7.11
1969 7.12
1970 7.13
1971 7.14
1972 7.15
1973 7.15
1974 7.15
1975 7.15
1976 7.15
1977 7.15
1978 7.15
1979 7.15
1980 7.15
1981 7.15
1982 7.15
1983 7.15
1984 7.15
1985 7.15
1986 7.15
1987 7.16
1988 7.16
1989 7.16
1990 7.17
1991 7.16
1992 7.15
1993 7.12
1994 7.09
1995 7.06
1996 7.02
1997 6.98
1998 6.95
1999 6.92
2000 6.9
2001 6.88
2002 6.86
2003 6.84
2004 6.82
2005 6.79
2006 6.76
2007 6.72
2008 6.67
2009 6.61
2010 6.55
2011 6.47
2012 6.4
2013 6.32
2014 6.23
2015 6.15
2016 6.06
2017 5.97
2018 5.88