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 5.95
1875 5.95
1876 5.96
1877 5.96
1878 5.92
1879 5.87
1880 5.83
1881 5.78
1882 5.74
1883 5.77
1884 5.8
1885 5.83
1886 5.86
1887 5.9
1888 5.83
1889 5.76
1890 5.7
1891 5.63
1892 5.56
1893 5.54
1894 5.52
1895 5.5
1896 5.49
1897 5.47
1898 5.42
1899 5.37
1900 5.31
1901 5.26
1902 5.21
1903 5.16
1904 5.1
1905 5.04
1906 4.99
1907 4.93
1908 4.86
1909 4.78
1910 4.71
1911 4.63
1912 4.56
1913 4.13
1914 3.7
1915 3.28
1916 2.85
1917 2.43
1918 3.03
1919 3.64
1920 4.25
1921 4.96
1922 4.67
1923 4.55
1924 4.25
1925 4.01
1926 3.98
1927 3.76
1928 3.69
1929 3.48
1930 3.49
1931 3.33
1932 3.29
1933 2.96
1934 2.86
1935 2.8
1936 2.79
1937 2.77
1938 2.8
1939 2.83
1940 2.87
1941 2.9
1942 2.93
1943 2.96
1944 3
1945 3.03
1946 3.11
1947 3.22
1948 3.26
1949 3.26
1950 3.59
1951 3.57
1952 3.53
1953 3.48
1954 3.43
1955 3.38
1956 3.33
1957 3.27
1958 3.21
1959 3.15
1960 3.09
1961 3.01
1962 2.94
1963 2.86
1964 2.78
1965 2.7
1966 2.64
1967 2.58
1968 2.54
1969 2.51
1970 2.5
1971 2.5
1972 2.5
1973 2.5
1974 2.5
1975 2.5
1976 2.48
1977 2.47
1978 2.44
1979 2.41
1980 2.37
1981 2.34
1982 2.3
1983 2.27
1984 2.25
1985 2.22
1986 2.2
1987 2.17
1988 2.13
1989 2.09
1990 2.04
1991 1.97
1992 1.89
1993 1.81
1994 1.72
1995 1.63
1996 1.53
1997 1.45
1998 1.38
1999 1.31
2000 1.27
2001 1.24
2002 1.23
2003 1.22
2004 1.23
2005 1.25
2006 1.27
2007 1.29
2008 1.32
2009 1.34
2010 1.36
2011 1.37
2012 1.38
2013 1.4
2014 1.41
2015 1.43
2016 1.44
2017 1.46
2018 1.47