Year Total
1800 5.72
1801 5.72
1802 5.72
1803 5.72
1804 5.72
1805 5.72
1806 5.72
1807 5.72
1808 5.72
1809 5.72
1810 5.72
1811 5.72
1812 5.72
1813 5.72
1814 5.72
1815 5.72
1816 5.72
1817 5.72
1818 5.72
1819 5.72
1820 5.72
1821 5.72
1822 5.72
1823 5.72
1824 5.72
1825 5.72
1826 5.72
1827 5.72
1828 5.72
1829 5.72
1830 5.72
1831 5.72
1832 5.72
1833 5.72
1834 5.72
1835 5.72
1836 5.72
1837 5.72
1838 5.72
1839 5.72
1840 5.72
1841 5.72
1842 5.72
1843 5.72
1844 5.72
1845 5.72
1846 5.72
1847 5.72
1848 5.72
1849 5.72
1850 5.72
1851 5.72
1852 5.72
1853 5.72
1854 5.72
1855 5.72
1856 5.72
1857 5.72
1858 5.72
1859 5.72
1860 5.72
1861 5.72
1862 5.63
1863 5.54
1864 5.44
1865 5.35
1866 5.26
1867 5.17
1868 5.07
1869 4.98
1870 4.89
1871 4.8
1872 4.77
1873 4.75
1874 4.72
1875 4.7
1876 4.68
1877 4.65
1878 4.63
1879 4.6
1880 4.58
1881 4.56
1882 4.52
1883 4.49
1884 4.45
1885 4.42
1886 4.38
1887 4.35
1888 4.31
1889 4.27
1890 4.24
1891 4.2
1892 4.19
1893 4.17
1894 4.15
1895 4.13
1896 4.11
1897 4.1
1898 4.08
1899 4.06
1900 4.04
1901 4.02
1902 4.03
1903 4.03
1904 4.03
1905 4.03
1906 4.04
1907 4.04
1908 4.04
1909 4.04
1910 4.05
1911 4.05
1912 4
1913 3.95
1914 3.89
1915 3.84
1916 3.79
1917 3.74
1918 3.68
1919 3.63
1920 3.58
1921 3.53
1922 3.4
1923 3.23
1924 3.22
1925 3.13
1926 3.35
1927 3.32
1928 3.29
1929 3.22
1930 3.28
1931 3.19
1932 3.08
1933 2.86
1934 2.8
1935 2.75
1936 2.69
1937 2.64
1938 2.7
1939 2.65
1940 2.76
1941 2.82
1942 2.96
1943 3.04
1944 3
1945 3.01
1946 3.37
1947 3.59
1948 3.44
1949 3.45
1950 3.45
1951 3.49
1952 3.61
1953 3.7
1954 3.78
1955 3.82
1956 3.87
1957 3.91
1958 3.92
1959 3.92
1960 3.88
1961 3.81
1962 3.7
1963 3.56
1964 3.38
1965 3.18
1966 2.96
1967 2.75
1968 2.56
1969 2.38
1970 2.23
1971 2.11
1972 2.01
1973 1.93
1974 1.87
1975 1.81
1976 1.77
1977 1.74
1978 1.71
1979 1.69
1980 1.67
1981 1.65
1982 1.63
1983 1.62
1984 1.62
1985 1.61
1986 1.61
1987 1.62
1988 1.63
1989 1.65
1990 1.66
1991 1.67
1992 1.68
1993 1.67
1994 1.66
1995 1.64
1996 1.61
1997 1.58
1998 1.56
1999 1.54
2000 1.52
2001 1.52
2002 1.52
2003 1.53
2004 1.55
2005 1.57
2006 1.6
2007 1.62
2008 1.63
2009 1.64
2010 1.64
2011 1.63
2012 1.62
2013 1.61
2014 1.6
2015 1.59
2016 1.58
2017 1.57
2018 1.56