Year Total
1800 5.71
1801 5.71
1802 5.71
1803 5.71
1804 5.71
1805 5.71
1806 5.71
1807 5.71
1808 5.71
1809 5.71
1810 5.71
1811 5.71
1812 5.71
1813 5.71
1814 5.71
1815 5.71
1816 5.71
1817 5.71
1818 5.71
1819 5.71
1820 5.71
1821 5.71
1822 5.71
1823 5.71
1824 5.71
1825 5.71
1826 5.71
1827 5.71
1828 5.71
1829 5.71
1830 5.71
1831 5.71
1832 5.71
1833 5.71
1834 5.71
1835 5.71
1836 5.71
1837 5.71
1838 5.71
1839 5.71
1840 5.71
1841 5.71
1842 5.71
1843 5.71
1844 5.71
1845 5.71
1846 5.71
1847 5.71
1848 5.71
1849 5.71
1850 5.71
1851 5.71
1852 5.71
1853 5.71
1854 5.71
1855 5.71
1856 5.71
1857 5.71
1858 5.71
1859 5.71
1860 5.71
1861 5.71
1862 5.71
1863 5.71
1864 5.71
1865 5.71
1866 5.71
1867 5.71
1868 5.71
1869 5.71
1870 5.71
1871 5.71
1872 5.71
1873 5.71
1874 5.71
1875 5.71
1876 5.71
1877 5.71
1878 5.71
1879 5.71
1880 5.71
1881 5.71
1882 5.71
1883 5.71
1884 5.71
1885 5.71
1886 5.71
1887 5.71
1888 5.71
1889 5.71
1890 5.71
1891 5.71
1892 5.71
1893 5.71
1894 5.71
1895 5.71
1896 5.71
1897 5.71
1898 5.71
1899 5.71
1900 5.71
1901 5.71
1902 5.71
1903 5.71
1904 5.71
1905 5.71
1906 5.71
1907 5.71
1908 5.71
1909 5.71
1910 5.71
1911 5.71
1912 5.71
1913 5.71
1914 5.71
1915 5.71
1916 5.71
1917 5.71
1918 5.71
1919 5.71
1920 5.71
1921 5.71
1922 5.71
1923 5.71
1924 5.71
1925 5.71
1926 5.71
1927 5.7
1928 5.7
1929 5.7
1930 5.7
1931 5.69
1932 5.69
1933 5.69
1934 5.69
1935 5.68
1936 5.68
1937 5.68
1938 5.68
1939 5.67
1940 5.67
1941 5.67
1942 5.66
1943 5.66
1944 5.66
1945 5.66
1946 5.65
1947 5.65
1948 5.65
1949 5.65
1950 5.64
1951 5.67
1952 5.71
1953 5.73
1954 5.75
1955 5.75
1956 5.75
1957 5.73
1958 5.7
1959 5.66
1960 5.62
1961 5.56
1962 5.5
1963 5.44
1964 5.36
1965 5.28
1966 5.18
1967 5.07
1968 4.94
1969 4.79
1970 4.61
1971 4.4
1972 4.17
1973 3.9
1974 3.62
1975 3.33
1976 3.06
1977 2.81
1978 2.59
1979 2.42
1980 2.29
1981 2.2
1982 2.15
1983 2.12
1984 2.11
1985 2.11
1986 2.11
1987 2.11
1988 2.1
1989 2.08
1990 2.05
1991 2.02
1992 1.99
1993 1.96
1994 1.93
1995 1.92
1996 1.9
1997 1.9
1998 1.89
1999 1.89
2000 1.9
2001 1.91
2002 1.93
2003 1.95
2004 1.97
2005 2
2006 2.02
2007 2.04
2008 2.04
2009 2.04
2010 2.02
2011 2
2012 1.98
2013 1.95
2014 1.93
2015 1.91
2016 1.9
2017 1.89
2018 1.88