Year Total
1800 7.08
1801 7.08
1802 7.08
1803 7.08
1804 7.08
1805 7.08
1806 7.08
1807 7.08
1808 7.08
1809 7.08
1810 7.08
1811 7.08
1812 7.08
1813 7.08
1814 7.08
1815 7.08
1816 7.08
1817 7.08
1818 7.08
1819 7.08
1820 7.08
1821 7.08
1822 7.08
1823 7.08
1824 7.08
1825 7.08
1826 7.08
1827 7.08
1828 7.08
1829 7.08
1830 7.08
1831 7.08
1832 7.08
1833 7.08
1834 7.08
1835 7.08
1836 7.08
1837 7.08
1838 7.08
1839 7.08
1840 7.08
1841 7.08
1842 7.08
1843 7.08
1844 7.08
1845 7.08
1846 7.08
1847 7.08
1848 7.08
1849 7.08
1850 7.08
1851 7.08
1852 7.08
1853 7.08
1854 7.08
1855 7.08
1856 7.08
1857 7.08
1858 7.08
1859 7.08
1860 7.08
1861 7.08
1862 7.08
1863 7.08
1864 7.08
1865 7.08
1866 7.08
1867 7.08
1868 7.08
1869 7.08
1870 7.08
1871 7.08
1872 7.08
1873 7.08
1874 7.08
1875 7.08
1876 7.08
1877 7.08
1878 7.08
1879 7.08
1880 7.08
1881 7.08
1882 7.08
1883 7.08
1884 7.08
1885 7.08
1886 7.08
1887 7.08
1888 7.08
1889 7.08
1890 7.08
1891 7.08
1892 7.08
1893 7.08
1894 7.08
1895 7.08
1896 7.08
1897 7.08
1898 7.08
1899 7.08
1900 7.08
1901 7.08
1902 7.08
1903 7.08
1904 7.08
1905 7.08
1906 7.08
1907 7.08
1908 7.08
1909 7.08
1910 7.08
1911 7.08
1912 7.08
1913 7.08
1914 7.08
1915 7.08
1916 7.08
1917 7.08
1918 7.08
1919 7.08
1920 7.08
1921 7.08
1922 7.08
1923 7.08
1924 7.08
1925 7.08
1926 7.07
1927 7.07
1928 7.06
1929 7.05
1930 7.05
1931 7.04
1932 7.03
1933 7.03
1934 7.02
1935 7.01
1936 7.01
1937 7
1938 6.99
1939 6.99
1940 6.98
1941 6.97
1942 6.97
1943 6.96
1944 6.95
1945 6.95
1946 6.94
1947 6.93
1948 6.93
1949 6.92
1950 6.92
1951 6.91
1952 6.91
1953 6.91
1954 6.91
1955 6.91
1956 6.91
1957 6.92
1958 6.92
1959 6.93
1960 6.93
1961 6.92
1962 6.91
1963 6.9
1964 6.87
1965 6.83
1966 6.77
1967 6.7
1968 6.62
1969 6.53
1970 6.44
1971 6.36
1972 6.29
1973 6.24
1974 6.21
1975 6.21
1976 6.24
1977 6.29
1978 6.35
1979 6.42
1980 6.48
1981 6.52
1982 6.52
1983 6.47
1984 6.37
1985 6.22
1986 6.01
1987 5.76
1988 5.47
1989 5.15
1990 4.82
1991 4.48
1992 4.14
1993 3.81
1994 3.5
1995 3.22
1996 2.96
1997 2.73
1998 2.53
1999 2.36
2000 2.21
2001 2.09
2002 2
2003 1.93
2004 1.87
2005 1.83
2006 1.81
2007 1.79
2008 1.78
2009 1.77
2010 1.77
2011 1.76
2012 1.74
2013 1.73
2014 1.71
2015 1.69
2016 1.66
2017 1.64
2018 1.61