Year Total
1800 5.94
1801 5.94
1802 5.94
1803 5.94
1804 5.94
1805 5.94
1806 5.94
1807 5.94
1808 5.94
1809 5.94
1810 5.94
1811 5.94
1812 5.94
1813 5.94
1814 5.94
1815 5.94
1816 5.94
1817 5.94
1818 5.94
1819 5.94
1820 5.94
1821 5.94
1822 5.94
1823 5.94
1824 5.94
1825 5.94
1826 5.94
1827 5.94
1828 5.94
1829 5.94
1830 5.94
1831 5.94
1832 5.94
1833 5.94
1834 5.94
1835 5.94
1836 5.94
1837 5.94
1838 5.94
1839 5.94
1840 5.94
1841 5.94
1842 5.94
1843 5.94
1844 5.94
1845 5.94
1846 5.94
1847 5.94
1848 5.94
1849 5.94
1850 5.94
1851 5.94
1852 5.94
1853 5.94
1854 5.94
1855 5.94
1856 5.94
1857 5.94
1858 5.94
1859 5.94
1860 5.94
1861 5.94
1862 5.94
1863 5.94
1864 5.94
1865 5.94
1866 5.94
1867 5.94
1868 5.94
1869 5.94
1870 5.94
1871 5.94
1872 5.94
1873 5.94
1874 5.94
1875 5.94
1876 5.94
1877 5.94
1878 5.94
1879 5.94
1880 5.94
1881 5.94
1882 5.94
1883 5.94
1884 5.94
1885 5.94
1886 5.94
1887 5.94
1888 5.94
1889 5.94
1890 5.94
1891 5.94
1892 5.94
1893 5.94
1894 5.94
1895 5.94
1896 5.94
1897 5.94
1898 5.94
1899 5.94
1900 5.94
1901 5.94
1902 5.94
1903 5.94
1904 5.94
1905 5.94
1906 5.94
1907 5.94
1908 5.94
1909 5.94
1910 5.94
1911 5.94
1912 5.94
1913 5.94
1914 5.94
1915 5.94
1916 5.94
1917 5.94
1918 5.94
1919 5.94
1920 5.94
1921 5.94
1922 5.94
1923 5.94
1924 5.94
1925 5.94
1926 5.92
1927 5.9
1928 5.89
1929 5.87
1930 5.85
1931 5.83
1932 5.82
1933 5.8
1934 5.78
1935 5.76
1936 5.75
1937 5.73
1938 5.71
1939 5.69
1940 5.67
1941 5.66
1942 5.64
1943 5.62
1944 5.6
1945 5.59
1946 5.57
1947 5.55
1948 5.53
1949 5.51
1950 5.5
1951 5.5
1952 5.54
1953 5.61
1954 5.71
1955 5.86
1956 6.04
1957 6.25
1958 6.48
1959 6.72
1960 6.95
1961 7.17
1962 7.35
1963 7.48
1964 7.56
1965 7.59
1966 7.6
1967 7.59
1968 7.58
1969 7.58
1970 7.57
1971 7.55
1972 7.5
1973 7.41
1974 7.29
1975 7.14
1976 6.97
1977 6.78
1978 6.59
1979 6.4
1980 6.21
1981 6.03
1982 5.86
1983 5.7
1984 5.53
1985 5.35
1986 5.14
1987 4.91
1988 4.64
1989 4.36
1990 4.05
1991 3.75
1992 3.45
1993 3.18
1994 2.94
1995 2.74
1996 2.57
1997 2.43
1998 2.31
1999 2.22
2000 2.14
2001 2.1
2002 2.08
2003 2.08
2004 2.11
2005 2.17
2006 2.24
2007 2.33
2008 2.43
2009 2.54
2010 2.64
2011 2.72
2012 2.77
2013 2.81
2014 2.81
2015 2.79
2016 2.76
2017 2.71
2018 2.67