Year Years
1800 37
1801 37
1802 37
1803 37
1804 37
1805 37
1806 37
1807 37
1808 37
1809 37
1810 37
1811 37
1812 37
1813 37
1814 37
1815 37
1816 37
1817 37
1818 37
1819 37
1820 37
1821 37
1822 37
1823 37
1824 37
1825 37
1826 37
1827 37
1828 37
1829 37
1830 37
1831 37
1832 37
1833 37
1834 37
1835 37
1836 37
1837 37
1838 37
1839 37
1840 37
1841 37
1842 37
1843 37
1844 37
1845 37
1846 37
1847 37
1848 37
1849 37
1850 37
1851 37
1852 37
1853 37
1854 37
1855 37
1856 37
1857 37
1858 37
1859 37
1860 37
1861 37
1862 37
1863 37
1864 37
1865 37
1866 37
1867 37
1868 37
1869 37
1870 37
1871 37.26
1872 37.52
1873 37.79
1874 38.04
1875 38.3
1876 38.56
1877 38.83
1878 39.09
1879 39.34
1880 39.6
1881 39.87
1882 40.13
1883 40.39
1884 40.65
1885 40.91
1886 41.17
1887 41.43
1888 41.69
1889 41.96
1890 42.21
1891 42.47
1892 42.73
1893 43
1894 43.26
1895 43.51
1896 43.77
1897 44.04
1898 44.3
1899 44.56
1900 44.81
1901 45.08
1902 45.34
1903 45.6
1904 45.85
1905 46.11
1906 46.38
1907 46.64
1908 46.89
1909 47.15
1910 47.42
1911 47.68
1912 47.93
1913 48.19
1914 48.46
1915 48.72
1916 48.97
1917 49.23
1918 49.5
1919 49.76
1920 50.01
1921 50.27
1922 50.54
1923 50.8
1924 51.05
1925 51.31
1926 51.58
1927 51.83
1928 52.09
1929 52.35
1930 52.62
1931 52.87
1932 53.13
1933 53.39
1934 53.65
1935 53.91
1936 54.17
1937 54.42
1938 54.68
1939 54.95
1940 55.21
1941 55.46
1942 55.72
1943 55.99
1944 56.24
1945 56.5
1946 56.76
1947 57.02
1948 57.28
1949 57.54
1950 57.79
1951 57.73
1952 57.65
1953 57.7
1954 57.85
1955 58.13
1956 58.53
1957 59.02
1958 59.6
1959 60.23
1960 60.89
1961 61.52
1962 62.12
1963 62.63
1964 63.06
1965 63.42
1966 63.76
1967 64.11
1968 64.49
1969 64.92
1970 65.39
1971 65.89
1972 66.39
1973 67
1974 67.58
1975 68.04
1976 68.44
1977 68.81
1978 69.37
1979 69.96
1980 70.36
1981 70.78
1982 70.48
1983 70.72
1984 70.4
1985 69.85
1986 69.54
1987 69.43
1988 69.52
1989 69.25
1990 69.31
1991 69.36
1992 69.48
1993 69.52
1994 69.94
1995 70.4
1996 70.44
1997 70.59
1998 70.75
1999 70.97
2000 71.15
2001 71.31
2002 71.46
2003 71.6
2004 71.8
2005 72.07
2006 72.42
2007 72.74
2008 73.07
2009 73.24
2010 73.38
2011 73.5
2012 73.62
2013 73.66
2014 73.61
2015 73.7
2016 73.82
2017 74.03
2018 74.23