Year Total
1800 5.67
1801 5.67
1802 5.67
1803 5.67
1804 5.67
1805 5.67
1806 5.67
1807 5.67
1808 5.67
1809 5.67
1810 5.67
1811 5.67
1812 5.67
1813 5.67
1814 5.67
1815 5.67
1816 5.67
1817 5.67
1818 5.67
1819 5.67
1820 5.67
1821 5.67
1822 5.67
1823 5.67
1824 5.67
1825 5.67
1826 5.67
1827 5.67
1828 5.67
1829 5.67
1830 5.67
1831 5.67
1832 5.67
1833 5.67
1834 5.67
1835 5.67
1836 5.67
1837 5.67
1838 5.67
1839 5.67
1840 5.67
1841 5.67
1842 5.67
1843 5.67
1844 5.67
1845 5.67
1846 5.67
1847 5.67
1848 5.67
1849 5.67
1850 5.67
1851 5.67
1852 5.67
1853 5.67
1854 5.67
1855 5.67
1856 5.67
1857 5.67
1858 5.67
1859 5.67
1860 5.67
1861 5.67
1862 5.67
1863 5.67
1864 5.67
1865 5.67
1866 5.67
1867 5.67
1868 5.67
1869 5.67
1870 5.67
1871 5.67
1872 5.67
1873 5.67
1874 5.67
1875 5.67
1876 5.67
1877 5.67
1878 5.67
1879 5.67
1880 5.67
1881 5.67
1882 5.67
1883 5.67
1884 5.67
1885 5.67
1886 5.67
1887 5.67
1888 5.67
1889 5.67
1890 5.67
1891 5.67
1892 5.67
1893 5.67
1894 5.67
1895 5.67
1896 5.67
1897 5.67
1898 5.67
1899 5.67
1900 5.67
1901 5.67
1902 5.67
1903 5.67
1904 5.67
1905 5.67
1906 5.67
1907 5.67
1908 5.67
1909 5.67
1910 5.67
1911 5.67
1912 5.67
1913 5.67
1914 5.67
1915 5.67
1916 5.67
1917 5.67
1918 5.67
1919 5.67
1920 5.67
1921 5.67
1922 5.67
1923 5.67
1924 5.67
1925 5.67
1926 5.67
1927 5.67
1928 5.67
1929 5.67
1930 5.67
1931 5.67
1932 5.67
1933 5.67
1934 5.67
1935 5.67
1936 5.67
1937 5.67
1938 5.67
1939 5.67
1940 5.67
1941 5.67
1942 5.67
1943 5.67
1944 5.67
1945 5.67
1946 5.67
1947 5.67
1948 5.67
1949 5.67
1950 5.67
1951 5.67
1952 5.68
1953 5.69
1954 5.7
1955 5.72
1956 5.74
1957 5.77
1958 5.8
1959 5.84
1960 5.88
1961 5.92
1962 5.97
1963 6.01
1964 6.05
1965 6.09
1966 6.14
1967 6.18
1968 6.22
1969 6.25
1970 6.29
1971 6.32
1972 6.35
1973 6.37
1974 6.38
1975 6.39
1976 6.38
1977 6.36
1978 6.32
1979 6.27
1980 6.21
1981 6.13
1982 6.05
1983 5.96
1984 5.87
1985 5.77
1986 5.68
1987 5.59
1988 5.5
1989 5.42
1990 5.35
1991 5.29
1992 5.24
1993 5.2
1994 5.17
1995 5.14
1996 5.13
1997 5.12
1998 5.11
1999 5.11
2000 5.1
2001 5.09
2002 5.08
2003 5.07
2004 5.05
2005 5.04
2006 5.03
2007 5.01
2008 5
2009 4.97
2010 4.95
2011 4.92
2012 4.88
2013 4.83
2014 4.78
2015 4.72
2016 4.66
2017 4.6
2018 4.54