Year Total
1800 5.97
1801 5.97
1802 5.96
1803 5.96
1804 5.96
1805 5.95
1806 5.95
1807 5.95
1808 5.94
1809 5.94
1810 5.94
1811 5.93
1812 5.93
1813 5.93
1814 5.92
1815 5.92
1816 5.92
1817 5.91
1818 5.91
1819 5.91
1820 5.9
1821 5.9
1822 5.9
1823 5.89
1824 5.89
1825 5.89
1826 5.88
1827 5.88
1828 5.87
1829 5.87
1830 5.87
1831 5.86
1832 5.86
1833 5.86
1834 5.85
1835 5.85
1836 5.85
1837 5.84
1838 5.84
1839 5.84
1840 5.83
1841 5.83
1842 5.83
1843 5.82
1844 5.82
1845 5.82
1846 5.81
1847 5.81
1848 5.81
1849 5.8
1850 5.8
1851 5.8
1852 5.8
1853 5.8
1854 5.8
1855 5.79
1856 5.79
1857 5.79
1858 5.79
1859 5.79
1860 5.79
1861 5.79
1862 5.79
1863 5.78
1864 5.78
1865 5.78
1866 5.78
1867 5.78
1868 5.78
1869 5.78
1870 5.78
1871 5.78
1872 5.77
1873 5.77
1874 5.77
1875 5.77
1876 5.77
1877 5.77
1878 5.77
1879 5.77
1880 5.76
1881 5.76
1882 5.76
1883 5.71
1884 5.21
1885 5.45
1886 5.56
1887 5.64
1888 5.63
1889 5.57
1890 5.45
1891 5.44
1892 5.31
1893 5.04
1894 5.11
1895 5.25
1896 5.07
1897 4.3
1898 4.5
1899 4.6
1900 4.5
1901 4.41
1902 4.31
1903 4.34
1904 4.37
1905 4.4
1906 4.42
1907 4.45
1908 4.43
1909 4.41
1910 4.38
1911 4.36
1912 4.34
1913 4.22
1914 4.1
1915 3.98
1916 3.86
1917 3.74
1918 3.69
1919 3.64
1920 3.59
1921 3.53
1922 3.48
1923 3.45
1924 3.43
1925 3.4
1926 3.37
1927 3.34
1928 3.27
1929 3.2
1930 3.13
1931 3.06
1932 2.99
1933 2.93
1934 2.86
1935 2.8
1936 2.74
1937 2.68
1938 2.68
1939 2.68
1940 2.68
1941 2.68
1942 2.68
1943 2.68
1944 2.68
1945 2.68
1946 2.69
1947 2.69
1948 2.69
1949 2.69
1950 2.69
1951 2.7
1952 2.72
1953 2.74
1954 2.76
1955 2.78
1956 2.8
1957 2.83
1958 2.85
1959 2.87
1960 2.88
1961 2.89
1962 2.88
1963 2.87
1964 2.86
1965 2.84
1966 2.83
1967 2.83
1968 2.84
1969 2.87
1970 2.9
1971 2.94
1972 2.97
1973 2.99
1974 3
1975 2.98
1976 2.95
1977 2.91
1978 2.85
1979 2.79
1980 2.73
1981 2.67
1982 2.62
1983 2.57
1984 2.55
1985 2.53
1986 2.52
1987 2.52
1988 2.53
1989 2.53
1990 2.52
1991 2.51
1992 2.49
1993 2.47
1994 2.44
1995 2.4
1996 2.36
1997 2.33
1998 2.29
1999 2.27
2000 2.24
2001 2.22
2002 2.21
2003 2.19
2004 2.17
2005 2.16
2006 2.14
2007 2.13
2008 2.11
2009 2.09
2010 2.08
2011 2.06
2012 2.05
2013 2.03
2014 2.02
2015 2.01
2016 2
2017 1.98
2018 1.97