Year Years
1800 33
1801 33
1802 33
1803 33
1804 33
1805 33
1806 33
1807 33
1808 33
1809 33
1810 33
1811 33
1812 33
1813 33
1814 33
1815 33
1816 33
1817 33
1818 33
1819 33
1820 33
1821 33
1822 33
1823 33
1824 33
1825 33
1826 33
1827 33
1828 33
1829 33
1830 33
1831 33
1832 33
1833 33
1834 33
1835 33
1836 33
1837 33
1838 33
1839 33
1840 33
1841 33
1842 33
1843 33
1844 33
1845 33
1846 33
1847 33
1848 33
1849 33
1850 33
1851 33
1852 33
1853 33
1854 33
1855 33
1856 33
1857 33
1858 33
1859 33
1860 33
1861 33
1862 33
1863 33
1864 33
1865 33
1866 33
1867 33
1868 33
1869 33
1870 33
1871 33
1872 32.99
1873 32.99
1874 32.98
1875 32.98
1876 32.98
1877 32.97
1878 32.97
1879 32.96
1880 32.96
1881 32.96
1882 32.95
1883 32.95
1884 32.94
1885 32.94
1886 32.93
1887 32.93
1888 32.93
1889 32.92
1890 32.92
1891 32.91
1892 32.91
1893 32.91
1894 32.9
1895 32.9
1896 32.89
1897 32.89
1898 32.89
1899 32.88
1900 32.88
1901 32.87
1902 32.87
1903 32.87
1904 32.86
1905 32.86
1906 32.85
1907 32.85
1908 32.84
1909 32.84
1910 32.84
1911 32.83
1912 32.83
1913 32.82
1914 32.82
1915 32.82
1916 32.81
1917 32.81
1918 25.1
1919 32.8
1920 32.8
1921 32.79
1922 32.79
1923 32.78
1924 32.78
1925 32.78
1926 32.77
1927 32.77
1928 30.48
1929 30.38
1930 35.14
1931 32.25
1932 30.76
1933 32.05
1934 31.25
1935 32.93
1936 31.04
1937 34.21
1938 34.51
1939 35.69
1940 34.1
1941 35.39
1942 30.23
1943 29.53
1944 33.09
1945 32
1946 34.08
1947 35.76
1948 35.85
1949 36.34
1950 38.09
1951 38.8
1952 40.17
1953 41.44
1954 42.6
1955 43.66
1956 44.62
1957 45.48
1958 46.24
1959 46.93
1960 47.53
1961 48.09
1962 48.61
1963 49.09
1964 49.55
1965 49.99
1966 50.37
1967 50.71
1968 51
1969 51.26
1970 51.53
1971 52.45
1972 52.71
1973 53.05
1974 54.04
1975 54.8
1976 55.48
1977 56.23
1978 57.1
1979 58.11
1980 58.82
1981 59.18
1982 59.77
1983 60.39
1984 61.23
1985 61.1
1986 61.86
1987 62.26
1988 64.05
1989 64.65
1990 65.31
1991 65.54
1992 66.17
1993 66.69
1994 67.01
1995 67.69
1996 68.08
1997 68.44
1998 69.01
1999 69.37
2000 69.88
2001 69.73
2002 69.83
2003 69.92
2004 70.11
2005 70.27
2006 70.28
2007 70.54
2008 70.54
2009 70.44
2010 70.52
2011 70.88
2012 71.01
2013 71.53
2014 71.75
2015 71.92
2016 72.21
2017 72.39
2018 72.57