Year Total
1800 6.27
1801 6.27
1802 6.27
1803 6.27
1804 6.27
1805 6.27
1806 6.27
1807 6.27
1808 6.27
1809 6.27
1810 6.27
1811 6.27
1812 6.27
1813 6.27
1814 6.27
1815 6.27
1816 6.27
1817 6.27
1818 6.27
1819 6.27
1820 6.27
1821 6.27
1822 6.27
1823 6.27
1824 6.27
1825 6.27
1826 6.27
1827 6.27
1828 6.27
1829 6.27
1830 6.27
1831 6.27
1832 6.27
1833 6.27
1834 6.27
1835 6.27
1836 6.27
1837 6.27
1838 6.27
1839 6.27
1840 6.27
1841 6.27
1842 6.27
1843 6.27
1844 6.27
1845 6.27
1846 6.27
1847 6.27
1848 6.27
1849 6.27
1850 6.27
1851 6.27
1852 6.27
1853 6.27
1854 6.27
1855 6.27
1856 6.27
1857 6.27
1858 6.27
1859 6.27
1860 6.27
1861 6.27
1862 6.27
1863 6.27
1864 6.27
1865 6.27
1866 6.27
1867 6.27
1868 6.27
1869 6.27
1870 6.27
1871 6.27
1872 6.27
1873 6.27
1874 6.27
1875 6.27
1876 6.27
1877 6.27
1878 6.27
1879 6.27
1880 6.27
1881 6.27
1882 6.27
1883 6.27
1884 6.27
1885 6.27
1886 6.27
1887 6.27
1888 6.27
1889 6.27
1890 6.27
1891 6.27
1892 6.27
1893 6.27
1894 6.27
1895 6.27
1896 6.27
1897 6.27
1898 6.27
1899 6.27
1900 6.27
1901 6.27
1902 6.27
1903 6.27
1904 6.27
1905 6.27
1906 6.27
1907 6.27
1908 6.27
1909 6.27
1910 6.27
1911 6.27
1912 6.27
1913 6.27
1914 6.27
1915 6.27
1916 6.27
1917 6.27
1918 6.27
1919 6.27
1920 6.27
1921 6.27
1922 6.27
1923 6.27
1924 6.27
1925 6.27
1926 6.22
1927 6.17
1928 6.13
1929 6.08
1930 6.03
1931 5.98
1932 5.94
1933 5.89
1934 5.84
1935 5.79
1936 5.74
1937 5.7
1938 5.65
1939 5.6
1940 5.55
1941 5.51
1942 5.46
1943 5.41
1944 5.36
1945 5.31
1946 5.27
1947 5.22
1948 5.17
1949 5.12
1950 5.08
1951 5.05
1952 5.01
1953 4.98
1954 4.95
1955 4.93
1956 4.93
1957 4.92
1958 4.93
1959 4.95
1960 4.97
1961 5
1962 5.03
1963 5.05
1964 5.08
1965 5.08
1966 5.06
1967 5.01
1968 4.92
1969 4.8
1970 4.65
1971 4.47
1972 4.27
1973 4.06
1974 3.85
1975 3.66
1976 3.51
1977 3.4
1978 3.34
1979 3.33
1980 3.36
1981 3.42
1982 3.48
1983 3.55
1984 3.6
1985 3.65
1986 3.69
1987 3.74
1988 3.79
1989 3.85
1990 3.91
1991 3.97
1992 4.01
1993 4.03
1994 4.04
1995 4.03
1996 4
1997 3.96
1998 3.91
1999 3.87
2000 3.82
2001 3.79
2002 3.75
2003 3.72
2004 3.7
2005 3.68
2006 3.66
2007 3.64
2008 3.62
2009 3.59
2010 3.56
2011 3.52
2012 3.48
2013 3.44
2014 3.4
2015 3.36
2016 3.32
2017 3.28
2018 3.25