Year Total
1800 5.16
1801 5.16
1802 5.16
1803 5.16
1804 5.16
1805 5.16
1806 5.16
1807 5.16
1808 5.16
1809 5.16
1810 5.16
1811 5.16
1812 5.16
1813 5.16
1814 5.16
1815 5.16
1816 5.16
1817 5.16
1818 5.16
1819 5.16
1820 5.16
1821 5.16
1822 5.16
1823 5.16
1824 5.16
1825 5.16
1826 5.16
1827 5.16
1828 5.16
1829 5.16
1830 5.16
1831 5.16
1832 5.16
1833 5.16
1834 5.16
1835 5.16
1836 5.16
1837 5.16
1838 5.16
1839 5.16
1840 5.16
1841 5.16
1842 5.16
1843 5.16
1844 5.16
1845 5.16
1846 5.16
1847 5.16
1848 5.16
1849 5.16
1850 5.16
1851 5.16
1852 5.16
1853 5.16
1854 5.16
1855 5.16
1856 5.16
1857 5.16
1858 5.16
1859 5.16
1860 5.16
1861 5.16
1862 5.16
1863 5.16
1864 5.16
1865 5.16
1866 5.16
1867 5.16
1868 5.16
1869 5.16
1870 5.16
1871 5.16
1872 5.16
1873 5.16
1874 5.16
1875 5.16
1876 5.05
1877 4.95
1878 4.84
1879 4.73
1880 4.62
1881 4.52
1882 4.92
1883 5.16
1884 5.16
1885 5.04
1886 4.37
1887 5.15
1888 5.05
1889 4.92
1890 4.7
1891 5.24
1892 4.82
1893 4.69
1894 5.09
1895 5.45
1896 5.55
1897 5.7
1898 5.28
1899 5.45
1900 5.67
1901 5.7
1902 5.73
1903 5.76
1904 5.8
1905 5.83
1906 5.77
1907 5.72
1908 5.66
1909 5.6
1910 5.55
1911 5.52
1912 5.48
1913 5.45
1914 5.42
1915 5.39
1916 5.38
1917 5.37
1918 5.36
1919 5.35
1920 5.35
1921 5.27
1922 5.19
1923 5.11
1924 5.03
1925 4.94
1926 4.8
1927 4.65
1928 4.5
1929 4.36
1930 4.21
1931 4.07
1932 3.94
1933 3.81
1934 3.67
1935 3.54
1936 3.43
1937 3.31
1938 3.2
1939 3.09
1940 2.97
1941 3.03
1942 3.08
1943 3.13
1944 3.18
1945 3.23
1946 3.12
1947 3
1948 2.89
1949 2.77
1950 2.66
1951 2.62
1952 2.55
1953 2.49
1954 2.43
1955 2.39
1956 2.35
1957 2.31
1958 2.29
1959 2.26
1960 2.25
1961 2.23
1962 2.21
1963 2.2
1964 2.18
1965 2.17
1966 2.15
1967 2.14
1968 2.13
1969 2.13
1970 2.14
1971 2.14
1972 2.16
1973 2.17
1974 2.18
1975 2.19
1976 2.19
1977 2.18
1978 2.17
1979 2.14
1980 2.11
1981 2.08
1982 2.06
1983 2.03
1984 2.02
1985 2
1986 1.98
1987 1.94
1988 1.9
1989 1.84
1990 1.77
1991 1.69
1992 1.6
1993 1.51
1994 1.42
1995 1.34
1996 1.28
1997 1.23
1998 1.2
1999 1.18
2000 1.18
2001 1.19
2002 1.22
2003 1.26
2004 1.3
2005 1.34
2006 1.38
2007 1.42
2008 1.45
2009 1.47
2010 1.49
2011 1.5
2012 1.51
2013 1.52
2014 1.53
2015 1.55
2016 1.56
2017 1.58
2018 1.59