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 5.68
1938 5.68
1939 5.68
1940 5.69
1941 5.69
1942 5.69
1943 5.7
1944 5.71
1945 5.71
1946 5.72
1947 5.72
1948 5.73
1949 5.74
1950 5.75
1951 5.85
1952 6.03
1953 6.19
1954 6.32
1955 6.44
1956 6.54
1957 6.63
1958 6.7
1959 6.75
1960 6.79
1961 6.8
1962 6.78
1963 6.73
1964 6.63
1965 6.5
1966 6.33
1967 6.13
1968 5.9
1969 5.67
1970 5.46
1971 5.27
1972 5.13
1973 5.03
1974 4.99
1975 4.98
1976 5
1977 5.03
1978 5.06
1979 5.07
1980 5.07
1981 5.05
1982 5.02
1983 4.99
1984 4.95
1985 4.91
1986 4.87
1987 4.83
1988 4.78
1989 4.74
1990 4.69
1991 4.64
1992 4.58
1993 4.51
1994 4.45
1995 4.37
1996 4.3
1997 4.24
1998 4.17
1999 4.11
2000 4.06
2001 4.02
2002 3.98
2003 3.95
2004 3.93
2005 3.91
2006 3.9
2007 3.88
2008 3.87
2009 3.86
2010 3.84
2011 3.82
2012 3.8
2013 3.77
2014 3.73
2015 3.69
2016 3.65
2017 3.61
2018 3.57