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 5.13
1852 5.13
1853 5.13
1854 5.13
1855 5.13
1856 5.13
1857 5.13
1858 5.13
1859 5.13
1860 5.13
1861 5.13
1862 5.13
1863 5.13
1864 5.13
1865 5.13
1866 5.13
1867 5.13
1868 5.13
1869 5.13
1870 5.13
1871 5.06
1872 4.99
1873 4.92
1874 4.85
1875 4.78
1876 4.71
1877 4.64
1878 4.57
1879 4.5
1880 5.13
1881 5.13
1882 5.12
1883 5.12
1884 5.11
1885 5.11
1886 5.12
1887 5.13
1888 5.15
1889 5.16
1890 5.17
1891 5.18
1892 5.18
1893 5.19
1894 5.19
1895 5.2
1896 5.12
1897 5.03
1898 4.95
1899 4.87
1900 4.78
1901 4.88
1902 4.98
1903 5.08
1904 5.18
1905 5.28
1906 5.26
1907 5.23
1908 5.21
1909 5.18
1910 5.16
1911 5.08
1912 5
1913 4.92
1914 4.84
1915 4.76
1916 4.93
1917 5.11
1918 5.29
1919 5.46
1920 5.64
1921 5.45
1922 5.26
1923 5.06
1924 4.87
1925 4.68
1926 4.75
1927 4.82
1928 4.89
1929 4.96
1930 5.03
1931 4.93
1932 4.84
1933 4.75
1934 4.66
1935 4.57
1936 4.48
1937 4.39
1938 4.3
1939 4.22
1940 4.13
1941 4.11
1942 4.08
1943 4.06
1944 4.04
1945 4.02
1946 3.98
1947 3.93
1948 3.89
1949 3.85
1950 3.8
1951 3.91
1952 4.13
1953 4.33
1954 4.52
1955 4.7
1956 4.87
1957 5.02
1958 5.17
1959 5.3
1960 5.42
1961 5.53
1962 5.63
1963 5.71
1964 5.78
1965 5.82
1966 5.82
1967 5.79
1968 5.72
1969 5.62
1970 5.48
1971 5.31
1972 5.11
1973 4.9
1974 4.69
1975 4.48
1976 4.29
1977 4.12
1978 3.97
1979 3.84
1980 3.73
1981 3.64
1982 3.56
1983 3.48
1984 3.39
1985 3.31
1986 3.22
1987 3.14
1988 3.07
1989 3
1990 2.95
1991 2.9
1992 2.86
1993 2.83
1994 2.8
1995 2.77
1996 2.74
1997 2.7
1998 2.67
1999 2.62
2000 2.58
2001 2.53
2002 2.48
2003 2.44
2004 2.4
2005 2.36
2006 2.33
2007 2.29
2008 2.25
2009 2.21
2010 2.17
2011 2.14
2012 2.1
2013 2.07
2014 2.05
2015 2.03
2016 2.01
2017 1.99
2018 1.98