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 6.44
1897 6.44
1898 6.43
1899 6.42
1900 6.42
1901 6.41
1902 6.4
1903 6.4
1904 6.39
1905 6.38
1906 6.38
1907 6.37
1908 6.36
1909 6.36
1910 6.35
1911 6.34
1912 6.34
1913 6.33
1914 6.32
1915 6.32
1916 6.31
1917 6.3
1918 6.3
1919 6.29
1920 6.28
1921 6.28
1922 6.27
1923 6.26
1924 6.26
1925 6.25
1926 6.2
1927 6.15
1928 6.1
1929 6.05
1930 6
1931 5.95
1932 5.9
1933 5.85
1934 5.8
1935 5.76
1936 5.71
1937 5.66
1938 5.61
1939 5.56
1940 5.51
1941 5.39
1942 5.27
1943 5.15
1944 5.03
1945 4.91
1946 4.79
1947 4.67
1948 4.54
1949 4.42
1950 4.3
1951 4.33
1952 4.39
1953 4.43
1954 4.48
1955 4.52
1956 4.55
1957 4.57
1958 4.59
1959 4.59
1960 4.56
1961 4.51
1962 4.43
1963 4.32
1964 4.19
1965 4.05
1966 3.91
1967 3.8
1968 3.71
1969 3.65
1970 3.61
1971 3.59
1972 3.57
1973 3.54
1974 3.49
1975 3.43
1976 3.36
1977 3.28
1978 3.22
1979 3.16
1980 3.11
1981 3.09
1982 3.07
1983 3.06
1984 3.06
1985 3.06
1986 3.05
1987 3.02
1988 2.98
1989 2.92
1990 2.83
1991 2.73
1992 2.61
1993 2.48
1994 2.36
1995 2.24
1996 2.13
1997 2.05
1998 1.98
1999 1.94
2000 1.92
2001 1.94
2002 1.99
2003 2.07
2004 2.16
2005 2.26
2006 2.37
2007 2.47
2008 2.55
2009 2.62
2010 2.67
2011 2.7
2012 2.7
2013 2.7
2014 2.68
2015 2.66
2016 2.63
2017 2.6
2018 2.57