Year Total
1800 6.01
1801 6.01
1802 6.01
1803 6.01
1804 6.01
1805 6.01
1806 6.01
1807 6.01
1808 6.01
1809 6.01
1810 6.01
1811 6.01
1812 6.01
1813 6.01
1814 6.01
1815 6.01
1816 6.01
1817 6.01
1818 6.01
1819 6.01
1820 6.01
1821 6.01
1822 6.01
1823 6.01
1824 6.01
1825 6.01
1826 6.01
1827 6.01
1828 6.01
1829 6.01
1830 6.01
1831 6.01
1832 6.01
1833 6.01
1834 6.01
1835 6.01
1836 6.01
1837 6.01
1838 6.01
1839 6.01
1840 6.01
1841 6.01
1842 6.01
1843 6.01
1844 6.01
1845 6.01
1846 6.01
1847 6.01
1848 6.01
1849 6.01
1850 6.01
1851 6.01
1852 6.01
1853 6.01
1854 6.01
1855 6.01
1856 6.01
1857 6.01
1858 6.01
1859 6.01
1860 6.01
1861 6.01
1862 6.01
1863 6.01
1864 6.01
1865 6.01
1866 6.01
1867 6.01
1868 6.01
1869 6.01
1870 6.01
1871 6.01
1872 6.01
1873 6.01
1874 6.01
1875 6.01
1876 6.01
1877 6.01
1878 6.01
1879 6.01
1880 6.01
1881 6.01
1882 6.01
1883 6.01
1884 6.01
1885 6.01
1886 6.01
1887 6.01
1888 6.01
1889 6.01
1890 6.01
1891 6.01
1892 6.01
1893 6.01
1894 6.01
1895 6.01
1896 6.01
1897 6.01
1898 6.01
1899 6.01
1900 6.01
1901 6.01
1902 6.01
1903 6.01
1904 6.01
1905 6.01
1906 6.01
1907 6.01
1908 6.01
1909 6.01
1910 6.01
1911 6.01
1912 6.01
1913 6.01
1914 6.01
1915 6.01
1916 6.01
1917 6.01
1918 6.01
1919 6.01
1920 6.01
1921 6.01
1922 6.01
1923 6.01
1924 6.01
1925 6.01
1926 6
1927 5.98
1928 5.97
1929 5.96
1930 5.95
1931 5.93
1932 5.92
1933 5.91
1934 5.89
1935 5.88
1936 5.87
1937 5.85
1938 5.84
1939 5.83
1940 5.82
1941 5.8
1942 5.79
1943 5.78
1944 5.76
1945 5.75
1946 5.74
1947 5.72
1948 5.71
1949 5.7
1950 5.69
1951 5.77
1952 5.93
1953 6.09
1954 6.22
1955 6.35
1956 6.46
1957 6.56
1958 6.65
1959 6.73
1960 6.79
1961 6.85
1962 6.9
1963 6.94
1964 6.98
1965 7
1966 7.03
1967 7.04
1968 7.06
1969 7.06
1970 7.06
1971 7.06
1972 7.06
1973 7.06
1974 7.05
1975 7.05
1976 7.07
1977 7.08
1978 7.11
1979 7.13
1980 7.13
1981 7.1
1982 7.03
1983 6.92
1984 6.77
1985 6.58
1986 6.36
1987 6.14
1988 5.93
1989 5.74
1990 5.57
1991 5.45
1992 5.36
1993 5.29
1994 5.26
1995 5.25
1996 5.25
1997 5.27
1998 5.29
1999 5.31
2000 5.32
2001 5.31
2002 5.3
2003 5.28
2004 5.25
2005 5.22
2006 5.17
2007 5.11
2008 5.05
2009 4.99
2010 4.92
2011 4.82
2012 4.73
2013 4.64
2014 4.54
2015 4.45
2016 4.35
2017 4.28
2018 4.2