Year Total
1800 5.83
1801 5.83
1802 5.83
1803 5.83
1804 5.83
1805 5.83
1806 5.83
1807 5.83
1808 5.83
1809 5.83
1810 5.83
1811 5.83
1812 5.83
1813 5.83
1814 5.83
1815 5.83
1816 5.83
1817 5.83
1818 5.83
1819 5.83
1820 5.83
1821 5.83
1822 5.83
1823 5.83
1824 5.83
1825 5.83
1826 5.83
1827 5.83
1828 5.83
1829 5.83
1830 5.83
1831 5.83
1832 5.83
1833 5.83
1834 5.83
1835 5.83
1836 5.83
1837 5.83
1838 5.83
1839 5.83
1840 5.83
1841 5.83
1842 5.83
1843 5.83
1844 5.83
1845 5.83
1846 5.83
1847 5.83
1848 5.83
1849 5.83
1850 5.83
1851 5.83
1852 5.83
1853 5.83
1854 5.83
1855 5.83
1856 5.83
1857 5.83
1858 5.83
1859 5.83
1860 5.83
1861 5.83
1862 5.83
1863 5.83
1864 5.83
1865 5.83
1866 5.83
1867 5.83
1868 5.83
1869 5.83
1870 5.83
1871 5.83
1872 5.83
1873 5.83
1874 5.83
1875 5.83
1876 5.82
1877 5.81
1878 5.81
1879 5.8
1880 5.79
1881 5.78
1882 5.78
1883 5.77
1884 5.76
1885 5.75
1886 5.75
1887 5.74
1888 5.73
1889 5.72
1890 5.72
1891 5.71
1892 5.7
1893 5.69
1894 5.69
1895 5.68
1896 5.67
1897 5.66
1898 5.66
1899 5.65
1900 5.64
1901 5.63
1902 5.63
1903 5.62
1904 5.61
1905 5.6
1906 5.6
1907 5.67
1908 5.54
1909 5.83
1910 5.99
1911 6.06
1912 5.99
1913 5.92
1914 6
1915 5.8
1916 5.41
1917 5.93
1918 5.76
1919 5.58
1920 5.73
1921 6.21
1922 6.06
1923 5.67
1924 6
1925 5.92
1926 6.34
1927 6.26
1928 6.34
1929 6.38
1930 6.5
1931 6.64
1932 6.38
1933 6.42
1934 6.47
1935 6.51
1936 6.31
1937 6.5
1938 6.25
1939 6.34
1940 6.24
1941 5.96
1942 5.84
1943 5.8
1944 5.74
1945 5.68
1946 5.62
1947 5.55
1948 5.8
1949 6.05
1950 6.29
1951 6.34
1952 6.38
1953 6.42
1954 6.47
1955 6.49
1956 6.51
1957 6.33
1958 6.14
1959 5.96
1960 5.77
1961 5.59
1962 5.44
1963 5.28
1964 5.13
1965 4.97
1966 4.82
1967 4.6
1968 4.38
1969 4.15
1970 3.93
1971 3.71
1972 3.59
1973 3.46
1974 3.34
1975 3.21
1976 3.09
1977 2.9
1978 2.72
1979 2.67
1980 2.52
1981 2.46
1982 2.32
1983 2.17
1984 2.06
1985 1.88
1986 1.68
1987 1.7
1988 1.86
1989 1.68
1990 1.81
1991 1.72
1992 1.73
1993 1.76
1994 1.76
1995 1.78
1996 1.76
1997 1.77
1998 1.47
1999 1.56
2000 1.68
2001 1.4
2002 1.34
2003 1.24
2004 1.18
2005 1.12
2006 1.12
2007 1.1
2008 1.05
2009 1.03
2010 0.9
2011 1.07
2012 1.27
2013 1.07
2014 1.15
2015 1.17
2016 1.19
2017 1.21
2018 1.22