Year Total
1800 5.47
1801 5.47
1802 5.47
1803 5.47
1804 5.47
1805 5.47
1806 5.47
1807 5.47
1808 5.47
1809 5.47
1810 5.47
1811 5.47
1812 5.47
1813 5.47
1814 5.47
1815 5.47
1816 5.47
1817 5.47
1818 5.47
1819 5.47
1820 5.47
1821 5.47
1822 5.47
1823 5.47
1824 5.47
1825 5.47
1826 5.47
1827 5.47
1828 5.47
1829 5.47
1830 5.47
1831 5.47
1832 5.47
1833 5.47
1834 5.47
1835 5.47
1836 5.47
1837 5.47
1838 5.47
1839 5.47
1840 5.47
1841 5.47
1842 5.47
1843 5.47
1844 5.47
1845 5.47
1846 5.47
1847 5.47
1848 5.47
1849 5.47
1850 5.47
1851 5.47
1852 5.47
1853 5.47
1854 5.47
1855 5.47
1856 5.47
1857 5.47
1858 5.47
1859 5.47
1860 5.47
1861 5.47
1862 5.47
1863 5.47
1864 5.47
1865 5.47
1866 5.47
1867 5.47
1868 5.47
1869 5.47
1870 5.47
1871 5.47
1872 5.47
1873 5.47
1874 5.47
1875 5.47
1876 5.47
1877 5.47
1878 5.47
1879 5.47
1880 5.47
1881 5.47
1882 5.47
1883 5.47
1884 5.47
1885 5.47
1886 5.47
1887 5.47
1888 5.47
1889 5.47
1890 5.47
1891 5.47
1892 5.47
1893 5.47
1894 5.47
1895 5.47
1896 5.47
1897 5.47
1898 5.47
1899 5.47
1900 5.47
1901 5.47
1902 5.47
1903 5.47
1904 5.47
1905 5.47
1906 5.47
1907 5.47
1908 5.47
1909 5.47
1910 5.47
1911 5.47
1912 5.47
1913 5.47
1914 5.47
1915 5.47
1916 5.47
1917 5.47
1918 5.47
1919 5.47
1920 5.47
1921 5.47
1922 5.47
1923 5.47
1924 5.47
1925 5.47
1926 5.43
1927 5.39
1928 5.35
1929 5.32
1930 5.28
1931 5.24
1932 5.2
1933 5.16
1934 5.12
1935 5.08
1936 5.04
1937 5
1938 4.96
1939 4.92
1940 4.88
1941 4.84
1942 4.8
1943 4.76
1944 4.72
1945 4.68
1946 4.63
1947 4.59
1948 4.55
1949 4.51
1950 4.47
1951 4.44
1952 4.41
1953 4.42
1954 4.46
1955 4.54
1956 4.64
1957 4.75
1958 4.86
1959 4.96
1960 5.01
1961 5.03
1962 4.98
1963 4.86
1964 4.67
1965 4.42
1966 4.15
1967 3.89
1968 3.65
1969 3.45
1970 3.28
1971 3.15
1972 3.02
1973 2.89
1974 2.75
1975 2.61
1976 2.46
1977 2.31
1978 2.18
1979 2.05
1980 1.94
1981 1.84
1982 1.75
1983 1.66
1984 1.58
1985 1.5
1986 1.44
1987 1.39
1988 1.35
1989 1.32
1990 1.3
1991 1.27
1992 1.25
1993 1.23
1994 1.2
1995 1.16
1996 1.12
1997 1.08
1998 1.04
1999 1.01
2000 0.98
2001 0.97
2002 0.96
2003 0.95
2004 0.96
2005 0.97
2006 0.99
2007 1.02
2008 1.05
2009 1.08
2010 1.12
2011 1.15
2012 1.18
2013 1.22
2014 1.24
2015 1.27
2016 1.3
2017 1.32
2018 1.34