Year Total
1800 6.45
1801 6.45
1802 6.45
1803 6.45
1804 6.45
1805 6.45
1806 6.45
1807 6.45
1808 6.45
1809 6.45
1810 6.45
1811 6.45
1812 6.45
1813 6.45
1814 6.45
1815 6.45
1816 6.45
1817 6.45
1818 6.45
1819 6.45
1820 6.45
1821 6.45
1822 6.45
1823 6.45
1824 6.45
1825 6.45
1826 6.45
1827 6.45
1828 6.45
1829 6.45
1830 6.45
1831 6.45
1832 6.45
1833 6.45
1834 6.45
1835 6.45
1836 6.45
1837 6.45
1838 6.45
1839 6.45
1840 6.45
1841 6.45
1842 6.45
1843 6.45
1844 6.45
1845 6.45
1846 6.45
1847 6.45
1848 6.45
1849 6.45
1850 6.45
1851 6.45
1852 6.45
1853 6.45
1854 6.45
1855 6.45
1856 6.45
1857 6.45
1858 6.45
1859 6.45
1860 6.45
1861 6.45
1862 6.45
1863 6.45
1864 6.45
1865 6.45
1866 6.45
1867 6.45
1868 6.45
1869 6.45
1870 6.45
1871 6.45
1872 6.45
1873 6.45
1874 6.45
1875 6.45
1876 6.45
1877 6.45
1878 6.45
1879 6.45
1880 6.45
1881 6.45
1882 6.45
1883 6.45
1884 6.45
1885 6.45
1886 6.45
1887 6.45
1888 6.45
1889 6.45
1890 6.45
1891 6.45
1892 6.45
1893 6.45
1894 6.45
1895 6.45
1896 6.45
1897 6.45
1898 6.45
1899 6.45
1900 6.45
1901 6.39
1902 6.34
1903 6.28
1904 6.23
1905 6.17
1906 6.12
1907 6.06
1908 6.01
1909 5.95
1910 5.89
1911 5.84
1912 5.78
1913 5.73
1914 5.67
1915 5.62
1916 5.56
1917 5.51
1918 5.45
1919 5.39
1920 5.34
1921 5.28
1922 5.23
1923 5.17
1924 5.12
1925 5.06
1926 5.01
1927 4.95
1928 4.89
1929 4.84
1930 4.78
1931 4.81
1932 4.84
1933 4.86
1934 4.89
1935 4.92
1936 4.97
1937 5.02
1938 5.07
1939 5.12
1940 5.17
1941 5.21
1942 5.24
1943 5.28
1944 5.31
1945 5.35
1946 5.54
1947 5.73
1948 5.92
1949 6.11
1950 6.3
1951 6.4
1952 6.59
1953 6.73
1954 6.82
1955 6.87
1956 6.87
1957 6.83
1958 6.74
1959 6.62
1960 6.46
1961 6.28
1962 6.09
1963 5.88
1964 5.68
1965 5.48
1966 5.28
1967 5.08
1968 4.89
1969 4.71
1970 4.54
1971 4.4
1972 4.28
1973 4.18
1974 4.11
1975 4.05
1976 4.02
1977 3.99
1978 3.97
1979 3.94
1980 3.91
1981 3.86
1982 3.81
1983 3.76
1984 3.69
1985 3.63
1986 3.57
1987 3.51
1988 3.47
1989 3.43
1990 3.4
1991 3.37
1992 3.35
1993 3.33
1994 3.31
1995 3.28
1996 3.24
1997 3.21
1998 3.17
1999 3.13
2000 3.09
2001 3.05
2002 3
2003 2.95
2004 2.91
2005 2.86
2006 2.82
2007 2.77
2008 2.74
2009 2.7
2010 2.67
2011 2.64
2012 2.62
2013 2.59
2014 2.57
2015 2.54
2016 2.52
2017 2.49
2018 2.47