Year Years
1800 32
1801 32
1802 32
1803 32
1804 32
1805 32
1806 32
1807 32
1808 32
1809 32
1810 32
1811 32
1812 32
1813 32
1814 32
1815 32
1816 32
1817 32
1818 32
1819 32
1820 32
1821 32
1822 32
1823 32
1824 32
1825 32
1826 32
1827 32
1828 32
1829 32
1830 32
1831 32
1832 32
1833 32
1834 32
1835 32
1836 32
1837 32
1838 32
1839 32
1840 32
1841 32
1842 32
1843 32
1844 32
1845 32
1846 32
1847 32
1848 32
1849 32
1850 32
1851 32
1852 32
1853 32
1854 32
1855 32
1856 32
1857 32
1858 32
1859 32
1860 32
1861 32
1862 32
1863 32
1864 32
1865 32
1866 32
1867 32
1868 32
1869 32
1870 32
1871 31.99
1872 31.99
1873 31.98
1874 31.97
1875 31.96
1876 31.96
1877 31.95
1878 31.94
1879 31.94
1880 31.93
1881 31.92
1882 31.91
1883 31.91
1884 31.9
1885 31.89
1886 31.89
1887 31.88
1888 31.87
1889 31.86
1890 31.86
1891 31.85
1892 31.84
1893 31.84
1894 31.83
1895 31.82
1896 31.81
1897 31.81
1898 31.8
1899 31.79
1900 31.79
1901 31.78
1902 31.77
1903 31.76
1904 31.76
1905 31.75
1906 31.74
1907 31.74
1908 31.73
1909 31.72
1910 31.71
1911 31.71
1912 31.7
1913 31.69
1914 31.69
1915 31.68
1916 31.67
1917 31.67
1918 26.25
1919 31.65
1920 31.64
1921 31.64
1922 31.63
1923 31.62
1924 31.62
1925 31.61
1926 31.6
1927 31.59
1928 31.59
1929 31.58
1930 31.57
1931 31.57
1932 31.56
1933 31.55
1934 31.54
1935 31.54
1936 33.64
1937 35.75
1938 37.85
1939 39.96
1940 42.05
1941 44.16
1942 46.26
1943 48.36
1944 50.45
1945 52.56
1946 54.65
1947 56.75
1948 58.84
1949 60.94
1950 63.03
1951 63.34
1952 63.94
1953 64.51
1954 65.02
1955 65.5
1956 65.93
1957 66.33
1958 66.7
1959 67.02
1960 67.32
1961 67.61
1962 67.88
1963 68.14
1964 68.4
1965 68.64
1966 68.87
1967 69.08
1968 69.26
1969 69.43
1970 69.6
1971 71.05
1972 71.12
1973 66.64
1974 71.29
1975 71.55
1976 72.09
1977 72.54
1978 72.91
1979 73.29
1980 73.62
1981 73.83
1982 73.99
1983 74.05
1984 74.25
1985 74.5
1986 74.63
1987 74.88
1988 75.15
1989 75.62
1990 75.83
1991 75.91
1992 76.01
1993 76.32
1994 76.57
1995 76.97
1996 77.3
1997 77.61
1998 77.94
1999 78.23
2000 78.46
2001 78.58
2002 78.53
2003 79.01
2004 79.31
2005 79.68
2006 79.78
2007 80.2
2008 80.52
2009 80.86
2010 81.42
2011 81.63
2012 81.9
2013 82.01
2014 81.36
2015 82.02
2016 82.08
2017 82.25
2018 82.41