Year Total
1800 5.68
1801 5.68
1802 5.68
1803 5.68
1804 5.68
1805 5.68
1806 5.68
1807 5.68
1808 5.68
1809 5.68
1810 5.68
1811 5.68
1812 5.68
1813 5.68
1814 5.68
1815 5.68
1816 5.68
1817 5.68
1818 5.68
1819 5.68
1820 5.68
1821 5.68
1822 5.68
1823 5.68
1824 5.68
1825 5.68
1826 5.68
1827 5.68
1828 5.68
1829 5.68
1830 5.68
1831 5.68
1832 5.68
1833 5.68
1834 5.68
1835 5.68
1836 5.68
1837 5.68
1838 5.68
1839 5.68
1840 5.68
1841 5.68
1842 5.68
1843 5.68
1844 5.68
1845 5.68
1846 5.68
1847 5.68
1848 5.68
1849 5.68
1850 5.68
1851 5.68
1852 5.68
1853 5.68
1854 5.68
1855 5.68
1856 5.68
1857 5.68
1858 5.68
1859 5.68
1860 5.68
1861 5.68
1862 5.68
1863 5.68
1864 5.68
1865 5.68
1866 5.68
1867 5.68
1868 5.68
1869 5.68
1870 5.68
1871 5.68
1872 5.68
1873 5.68
1874 5.68
1875 5.68
1876 5.68
1877 5.68
1878 5.68
1879 5.68
1880 5.68
1881 5.68
1882 5.49
1883 5.94
1884 6.17
1885 5.46
1886 5.16
1887 6.1
1888 5.89
1889 5.03
1890 5.78
1891 5.69
1892 5.31
1893 5.37
1894 5.52
1895 5.19
1896 5.12
1897 5.94
1898 6.02
1899 4.92
1900 5.79
1901 5.48
1902 5.5
1903 5.59
1904 5.26
1905 4.36
1906 5.55
1907 5.11
1908 6.23
1909 5.7
1910 5.93
1911 5.76
1912 5.05
1913 5.85
1914 5.76
1915 5.67
1916 6.06
1917 6.29
1918 6.23
1919 5.46
1920 5.55
1921 6.17
1922 5.94
1923 5.88
1924 5.7
1925 6.06
1926 6.38
1927 6.23
1928 6.37
1929 5.82
1930 5.93
1931 5.68
1932 5.62
1933 5.86
1934 5.65
1935 5.22
1936 5.17
1937 5.72
1938 5.43
1939 5.44
1940 5.4
1941 5.5
1942 5.52
1943 6.09
1944 5.56
1945 5.49
1946 5.73
1947 5.86
1948 5.89
1949 5.79
1950 5.86
1951 5.87
1952 5.84
1953 5.86
1954 5.89
1955 5.9
1956 5.88
1957 5.83
1958 5.75
1959 5.65
1960 5.54
1961 5.42
1962 5.3
1963 5.18
1964 5.07
1965 4.96
1966 4.85
1967 4.73
1968 4.61
1969 4.48
1970 4.34
1971 4.21
1972 4.08
1973 3.97
1974 3.87
1975 3.78
1976 3.71
1977 3.63
1978 3.56
1979 3.49
1980 3.41
1981 3.32
1982 3.22
1983 3.12
1984 3.01
1985 2.9
1986 2.8
1987 2.7
1988 2.62
1989 2.54
1990 2.48
1991 2.43
1992 2.39
1993 2.35
1994 2.32
1995 2.29
1996 2.27
1997 2.25
1998 2.24
1999 2.24
2000 2.24
2001 2.25
2002 2.26
2003 2.27
2004 2.28
2005 2.28
2006 2.28
2007 2.27
2008 2.26
2009 2.23
2010 2.2
2011 2.17
2012 2.14
2013 2.11
2014 2.08
2015 2.06
2016 2.05
2017 2.03
2018 2.02