Year Years
1800 35.4
1801 35.4
1802 35.4
1803 35.4
1804 35.4
1805 35.4
1806 35.4
1807 35.4
1808 35.4
1809 35.4
1810 35.4
1811 35.4
1812 35.4
1813 35.4
1814 35.4
1815 35.4
1816 35.4
1817 35.4
1818 35.4
1819 35.4
1820 35.4
1821 35.4
1822 35.4
1823 35.4
1824 35.4
1825 35.4
1826 35.4
1827 35.4
1828 35.4
1829 35.4
1830 35.4
1831 35.4
1832 35.4
1833 35.4
1834 35.4
1835 35.4
1836 35.4
1837 35.4
1838 35.4
1839 35.4
1840 35.4
1841 35.4
1842 35.4
1843 35.4
1844 35.4
1845 35.4
1846 35.4
1847 35.4
1848 35.4
1849 35.4
1850 35.4
1851 35.4
1852 35.4
1853 35.4
1854 35.4
1855 35.4
1856 35.4
1857 35.4
1858 35.4
1859 35.4
1860 35.4
1861 35.4
1862 35.4
1863 35.4
1864 35.4
1865 35.4
1866 35.4
1867 35.4
1868 35.4
1869 35.4
1870 35.4
1871 35.4
1872 35.4
1873 35.41
1874 35.41
1875 35.41
1876 35.41
1877 35.42
1878 35.42
1879 35.42
1880 35.42
1881 35.43
1882 35.43
1883 35.43
1884 35.43
1885 35.43
1886 35.44
1887 35.44
1888 35.44
1889 35.44
1890 35.45
1891 35.45
1892 35.45
1893 35.45
1894 35.46
1895 35.46
1896 35.46
1897 35.46
1898 35.47
1899 35.47
1900 35.47
1901 35.47
1902 35.47
1903 35.48
1904 35.48
1905 35.48
1906 35.48
1907 35.49
1908 35.49
1909 35.49
1910 35.49
1911 35.5
1912 35.5
1913 35.5
1914 35.5
1915 35.5
1916 35.51
1917 35.51
1918 19.49
1919 35.51
1920 35.52
1921 35.52
1922 35.52
1923 35.52
1924 35.53
1925 35.53
1926 35.53
1927 35.53
1928 35.53
1929 35.54
1930 36.43
1931 37.34
1932 38.24
1933 39.14
1934 40.04
1935 40.94
1936 41.84
1937 42.75
1938 43.64
1939 43.19
1940 42.19
1941 41.69
1942 40.19
1943 37.18
1944 34.17
1945 47.23
1946 50.25
1947 51.77
1948 52.67
1949 53.58
1950 54.47
1951 54.69
1952 55.18
1953 55.77
1954 56.49
1955 57.33
1956 58.28
1957 59.32
1958 60.42
1959 61.56
1960 62.66
1961 63.69
1962 64.59
1963 65.33
1964 65.88
1965 66.27
1966 66.54
1967 66.74
1968 66.93
1969 67.13
1970 67.39
1971 68.01
1972 68.63
1973 69.24
1974 69.81
1975 70.35
1976 70.85
1977 71.32
1978 71.73
1979 72
1980 72.25
1981 72.4
1982 72.5
1983 72.61
1984 72.8
1985 72.98
1986 73.16
1987 73.18
1988 73.39
1989 73.65
1990 73.9
1991 73.88
1992 73.92
1993 73.94
1994 73.99
1995 74.14
1996 74.31
1997 72.47
1998 74.33
1999 74.39
2000 74.43
2001 74.48
2002 74.52
2003 74.59
2004 74.72
2005 74.91
2006 75.16
2007 75.4
2008 75.58
2009 75.88
2010 76.31
2011 76.69
2012 76.97
2013 77.2
2014 77.39
2015 77.56
2016 77.71
2017 77.86
2018 78.01