Year Total
1800 5.74
1801 5.74
1802 5.74
1803 5.74
1804 5.74
1805 5.74
1806 5.74
1807 5.74
1808 5.74
1809 5.74
1810 5.74
1811 5.74
1812 5.74
1813 5.74
1814 5.74
1815 5.74
1816 5.74
1817 5.74
1818 5.74
1819 5.74
1820 5.74
1821 5.74
1822 5.74
1823 5.74
1824 5.74
1825 5.74
1826 5.74
1827 5.74
1828 5.74
1829 5.74
1830 5.74
1831 5.74
1832 5.74
1833 5.74
1834 5.74
1835 5.74
1836 5.74
1837 5.74
1838 5.74
1839 5.74
1840 5.74
1841 5.74
1842 5.74
1843 5.74
1844 5.74
1845 5.74
1846 5.74
1847 5.74
1848 5.74
1849 5.74
1850 5.74
1851 5.74
1852 5.74
1853 5.74
1854 5.74
1855 5.74
1856 5.74
1857 5.74
1858 5.74
1859 5.74
1860 5.74
1861 5.74
1862 5.74
1863 5.74
1864 5.74
1865 5.74
1866 5.74
1867 5.74
1868 5.74
1869 5.74
1870 5.74
1871 5.74
1872 5.74
1873 5.74
1874 5.74
1875 5.74
1876 5.74
1877 5.74
1878 5.74
1879 5.74
1880 5.74
1881 5.74
1882 5.74
1883 5.74
1884 5.74
1885 5.74
1886 5.74
1887 5.74
1888 5.74
1889 5.74
1890 5.74
1891 5.74
1892 5.74
1893 5.74
1894 5.74
1895 5.74
1896 5.74
1897 5.74
1898 5.74
1899 5.74
1900 5.74
1901 5.74
1902 5.74
1903 5.74
1904 5.74
1905 5.74
1906 5.74
1907 5.74
1908 5.74
1909 5.74
1910 5.74
1911 5.74
1912 5.74
1913 5.74
1914 5.74
1915 5.74
1916 5.74
1917 5.74
1918 5.74
1919 5.74
1920 5.74
1921 5.74
1922 5.74
1923 5.74
1924 5.74
1925 5.74
1926 5.74
1927 5.74
1928 5.74
1929 5.74
1930 5.74
1931 5.74
1932 5.75
1933 5.75
1934 5.75
1935 5.75
1936 5.75
1937 5.75
1938 5.75
1939 5.75
1940 5.75
1941 5.75
1942 5.75
1943 5.75
1944 5.76
1945 5.76
1946 5.76
1947 5.76
1948 5.76
1949 5.76
1950 5.76
1951 5.75
1952 5.74
1953 5.73
1954 5.73
1955 5.73
1956 5.73
1957 5.74
1958 5.74
1959 5.74
1960 5.74
1961 5.72
1962 5.69
1963 5.65
1964 5.58
1965 5.5
1966 5.4
1967 5.3
1968 5.18
1969 5.06
1970 4.95
1971 4.84
1972 4.73
1973 4.63
1974 4.53
1975 4.44
1976 4.36
1977 4.27
1978 4.18
1979 4.09
1980 4
1981 3.9
1982 3.8
1983 3.69
1984 3.59
1985 3.48
1986 3.38
1987 3.28
1988 3.18
1989 3.09
1990 3
1991 2.92
1992 2.84
1993 2.77
1994 2.69
1995 2.62
1996 2.54
1997 2.47
1998 2.39
1999 2.31
2000 2.23
2001 2.13
2002 2.04
2003 1.94
2004 1.84
2005 1.75
2006 1.68
2007 1.63
2008 1.6
2009 1.6
2010 1.61
2011 1.64
2012 1.67
2013 1.7
2014 1.71
2015 1.72
2016 1.72
2017 1.71
2018 1.71