Year Total
1800 5.13
1801 5.13
1802 5.13
1803 5.13
1804 5.13
1805 5.13
1806 5.13
1807 5.13
1808 5.13
1809 5.13
1810 5.13
1811 5.13
1812 5.13
1813 5.13
1814 5.13
1815 5.13
1816 5.13
1817 5.13
1818 5.13
1819 5.13
1820 5.13
1821 5.13
1822 5.13
1823 5.13
1824 5.13
1825 5.13
1826 5.13
1827 5.13
1828 5.13
1829 5.13
1830 5.13
1831 5.13
1832 5.13
1833 5.13
1834 5.13
1835 5.13
1836 5.13
1837 5.13
1838 5.13
1839 5.13
1840 5.13
1841 5.13
1842 5.13
1843 5.13
1844 5.13
1845 5.13
1846 5.13
1847 5.13
1848 5.13
1849 5.13
1850 5.13
1851 5.07
1852 5.01
1853 4.95
1854 4.89
1855 4.83
1856 4.78
1857 4.72
1858 4.66
1859 4.75
1860 4.86
1861 5.16
1862 5.09
1863 5
1864 5.19
1865 5.11
1866 5.07
1867 5.09
1868 4.72
1869 4.9
1870 4.84
1871 4.83
1872 4.83
1873 4.82
1874 4.81
1875 4.8
1876 4.79
1877 4.78
1878 4.78
1879 4.74
1880 4.7
1881 4.91
1882 4.79
1883 4.71
1884 4.86
1885 4.8
1886 4.86
1887 4.78
1888 4.82
1889 4.82
1890 4.55
1891 4.67
1892 4.71
1893 4.71
1894 4.6
1895 4.63
1896 4.75
1897 4.51
1898 4.41
1899 4.53
1900 4.49
1901 4.71
1902 4.7
1903 4.69
1904 4.67
1905 4.66
1906 4.61
1907 4.57
1908 4.52
1909 4.48
1910 4.43
1911 4.39
1912 4.35
1913 4.3
1914 4.26
1915 4.22
1916 4.2
1917 4.19
1918 4.17
1919 4.16
1920 4.14
1921 4.08
1922 4.02
1923 4.02
1924 3.92
1925 3.82
1926 3.87
1927 3.7
1928 3.8
1929 3.69
1930 3.68
1931 3.58
1932 3.64
1933 3.59
1934 3.38
1935 3.31
1936 3.18
1937 2.89
1938 2.56
1939 2.12
1940 3.09
1941 2.47
1942 2.53
1943 2.88
1944 2.84
1945 2.91
1946 2.7
1947 2.67
1948 2.88
1949 2.68
1950 2.45
1951 2.47
1952 2.51
1953 2.55
1954 2.59
1955 2.62
1956 2.66
1957 2.69
1958 2.72
1959 2.74
1960 2.77
1961 2.79
1962 2.8
1963 2.82
1964 2.83
1965 2.83
1966 2.84
1967 2.85
1968 2.86
1969 2.87
1970 2.87
1971 2.87
1972 2.86
1973 2.84
1974 2.8
1975 2.75
1976 2.68
1977 2.59
1978 2.48
1979 2.36
1980 2.22
1981 2.09
1982 1.96
1983 1.84
1984 1.73
1985 1.63
1986 1.55
1987 1.49
1988 1.43
1989 1.38
1990 1.34
1991 1.31
1992 1.28
1993 1.25
1994 1.23
1995 1.21
1996 1.2
1997 1.2
1998 1.2
1999 1.21
2000 1.23
2001 1.25
2002 1.28
2003 1.3
2004 1.33
2005 1.35
2006 1.37
2007 1.38
2008 1.38
2009 1.38
2010 1.37
2011 1.35
2012 1.35
2013 1.34
2014 1.34
2015 1.35
2016 1.36
2017 1.38
2018 1.39