Year Years
1800 33.5
1801 33.5
1802 33.5
1803 33.5
1804 33.5
1805 33.5
1806 33.5
1807 33.5
1808 33.5
1809 33.5
1810 33.5
1811 33.5
1812 33.5
1813 33.5
1814 33.5
1815 33.5
1816 33.5
1817 33.5
1818 33.5
1819 33.5
1820 33.5
1821 33.5
1822 33.5
1823 33.5
1824 33.5
1825 33.5
1826 33.5
1827 33.5
1828 33.5
1829 33.5
1830 33.5
1831 33.5
1832 33.5
1833 33.5
1834 33.5
1835 33.5
1836 33.5
1837 33.5
1838 33.5
1839 33.5
1840 33.5
1841 33.5
1842 33.5
1843 33.5
1844 33.5
1845 33.5
1846 33.5
1847 33.5
1848 33.5
1849 33.5
1850 33.5
1851 33.5
1852 33.5
1853 33.5
1854 33.5
1855 33.5
1856 33.5
1857 33.5
1858 33.5
1859 33.5
1860 33.5
1861 33.5
1862 33.5
1863 33.5
1864 33.5
1865 33.5
1866 33.5
1867 33.5
1868 33.5
1869 33.5
1870 33.5
1871 33.53
1872 33.56
1873 33.58
1874 33.61
1875 33.64
1876 33.67
1877 33.69
1878 33.72
1879 33.75
1880 33.78
1881 33.81
1882 33.83
1883 33.86
1884 33.89
1885 33.92
1886 33.94
1887 33.97
1888 34
1889 34.03
1890 34.06
1891 34.08
1892 34.11
1893 34.14
1894 34.17
1895 34.19
1896 34.22
1897 34.25
1898 34.28
1899 34.31
1900 34.33
1901 34.36
1902 34.39
1903 34.42
1904 34.44
1905 34.47
1906 34.5
1907 34.53
1908 34.56
1909 34.58
1910 34.61
1911 34.64
1912 34.67
1913 34.69
1914 34.72
1915 34.75
1916 34.78
1917 34.81
1918 11.51
1919 34.86
1920 34.89
1921 34.92
1922 34.94
1923 34.97
1924 35
1925 35.03
1926 35.06
1927 35.08
1928 35.11
1929 35.14
1930 35.17
1931 35.72
1932 36.27
1933 36.84
1934 37.39
1935 37.95
1936 38.51
1937 39.08
1938 39.64
1939 40.2
1940 40.76
1941 41.33
1942 41.89
1943 42.45
1944 43.02
1945 43.59
1946 44.16
1947 44.72
1948 45.29
1949 45.86
1950 46.44
1951 46.89
1952 47.73
1953 48.53
1954 49.27
1955 49.95
1956 50.59
1957 51.18
1958 51.73
1959 52.23
1960 52.71
1961 53.17
1962 53.62
1963 54.06
1964 54.51
1965 54.98
1966 55.44
1967 55.89
1968 56.33
1969 56.78
1970 57.21
1971 57.6
1972 57.9
1973 58.2
1974 58.51
1975 58.75
1976 58.96
1977 59.13
1978 59.33
1979 59.58
1980 59.86
1981 60.14
1982 60.42
1983 60.66
1984 61.32
1985 61.92
1986 62.26
1987 62.91
1988 63.6
1989 64.09
1990 64.39
1991 64.72
1992 64.54
1993 64.99
1994 64.6
1995 64.25
1996 62.91
1997 60.95
1998 59.4
1999 57.59
2000 55.43
2001 54.33
2002 53.14
2003 52.12
2004 51.44
2005 51.08
2006 51
2007 51.44
2008 52.15
2009 53.07
2010 54.27
2011 55.75
2012 57.5
2013 59.24
2014 60.63
2015 61.77
2016 62.37
2017 63
2018 63.5