Year Total
1800 6.06
1801 6.06
1802 6.06
1803 6.06
1804 6.06
1805 6.06
1806 6.06
1807 6.06
1808 6.06
1809 6.06
1810 6.06
1811 6.06
1812 6.06
1813 6.06
1814 6.06
1815 6.06
1816 6.06
1817 6.06
1818 6.06
1819 6.06
1820 6.06
1821 6.06
1822 6.06
1823 6.06
1824 6.06
1825 6.06
1826 6.06
1827 6.06
1828 6.06
1829 6.06
1830 6.06
1831 6.06
1832 6.06
1833 6.06
1834 6.06
1835 6.06
1836 6.06
1837 6.06
1838 6.06
1839 6.06
1840 6.06
1841 6.06
1842 6.06
1843 6.06
1844 6.06
1845 6.06
1846 6.06
1847 6.06
1848 6.06
1849 6.06
1850 6.06
1851 6.06
1852 6.06
1853 6.06
1854 6.06
1855 6.06
1856 6.06
1857 6.06
1858 6.06
1859 6.06
1860 6.06
1861 6.06
1862 6.06
1863 6.06
1864 6.06
1865 6.06
1866 6.06
1867 6.06
1868 6.06
1869 6.06
1870 6.06
1871 6.06
1872 6.06
1873 6.06
1874 6.06
1875 6.06
1876 6.06
1877 6.06
1878 6.06
1879 6.06
1880 6.06
1881 6.06
1882 6.06
1883 6.06
1884 6.06
1885 6.06
1886 6.06
1887 6.06
1888 6.06
1889 6.06
1890 6.06
1891 6.06
1892 6.06
1893 6.06
1894 6.06
1895 6.06
1896 6.06
1897 6.06
1898 6.06
1899 6.06
1900 6.06
1901 6.06
1902 6.06
1903 6.06
1904 6.06
1905 6.06
1906 6.06
1907 6.06
1908 6.06
1909 6.06
1910 6.06
1911 6.06
1912 6.06
1913 6.06
1914 6.06
1915 6.06
1916 6.06
1917 6.06
1918 6.06
1919 6.06
1920 6.06
1921 6.06
1922 6.06
1923 6.06
1924 6.06
1925 6.06
1926 6.06
1927 6.06
1928 6.06
1929 6.06
1930 6.06
1931 6.06
1932 6.06
1933 6.06
1934 6.06
1935 6.06
1936 6.06
1937 6.06
1938 6.06
1939 6.06
1940 6.06
1941 6.06
1942 6.06
1943 6.06
1944 6.06
1945 6.06
1946 6.06
1947 6.06
1948 6.06
1949 6.06
1950 6.06
1951 6.07
1952 6.09
1953 6.11
1954 6.13
1955 6.15
1956 6.17
1957 6.19
1958 6.21
1959 6.23
1960 6.25
1961 6.27
1962 6.29
1963 6.3
1964 6.32
1965 6.34
1966 6.36
1967 6.39
1968 6.43
1969 6.48
1970 6.53
1971 6.58
1972 6.64
1973 6.69
1974 6.74
1975 6.78
1976 6.82
1977 6.86
1978 6.89
1979 6.93
1980 6.96
1981 6.99
1982 7.02
1983 7.06
1984 7.09
1985 7.12
1986 7.16
1987 7.2
1988 7.24
1989 7.28
1990 7.31
1991 7.35
1992 7.38
1993 7.4
1994 7.42
1995 7.43
1996 7.43
1997 7.42
1998 7.41
1999 7.38
2000 7.35
2001 7.32
2002 7.27
2003 7.21
2004 7.15
2005 7.07
2006 6.99
2007 6.9
2008 6.8
2009 6.7
2010 6.59
2011 6.48
2012 6.37
2013 6.26
2014 6.16
2015 6.05
2016 5.95
2017 5.85
2018 5.75