Year Years
1800 34.2
1801 34.2
1802 34.2
1803 34.2
1804 34.2
1805 34.2
1806 34.2
1807 34.2
1808 34.2
1809 34.2
1810 34.2
1811 34.2
1812 34.2
1813 34.2
1814 34.2
1815 34.2
1816 34.2
1817 34.2
1818 34.2
1819 34.2
1820 34.2
1821 34.2
1822 34.2
1823 34.2
1824 34.2
1825 34.2
1826 34.2
1827 34.2
1828 34.2
1829 34.2
1830 34.2
1831 34.2
1832 34.2
1833 34.2
1834 34.2
1835 34.2
1836 34.2
1837 34.2
1838 34.2
1839 34.2
1840 34.2
1841 34.2
1842 34.2
1843 34.2
1844 34.2
1845 34.2
1846 34.2
1847 34.2
1848 34.2
1849 34.2
1850 34.2
1851 34.2
1852 34.2
1853 34.2
1854 34.2
1855 34.2
1856 34.2
1857 34.2
1858 34.2
1859 34.2
1860 34.2
1861 34.2
1862 34.2
1863 34.2
1864 34.2
1865 34.2
1866 34.2
1867 34.2
1868 34.2
1869 34.2
1870 34.2
1871 34.2
1872 34.21
1873 34.21
1874 34.21
1875 34.21
1876 34.22
1877 34.22
1878 34.22
1879 34.22
1880 34.23
1881 34.23
1882 40.14
1883 38.14
1884 37.24
1885 37.84
1886 36.95
1887 35.55
1888 38.65
1889 37.66
1890 34.35
1891 37.36
1892 39.27
1893 38.67
1894 39.07
1895 37.47
1896 37.68
1897 37.08
1898 39.19
1899 37.68
1900 37.89
1901 38.19
1902 40.5
1903 34.69
1904 33.69
1905 37.7
1906 32.49
1907 29.58
1908 36.91
1909 37.41
1910 36.81
1911 38.02
1912 34.51
1913 37.63
1914 38.33
1915 37.13
1916 35.73
1917 31.82
1918 26.5
1919 36.74
1920 35.54
1921 30.82
1922 37.15
1923 38.16
1924 38.76
1925 39.07
1926 40.88
1927 39.57
1928 41.79
1929 43.2
1930 45.51
1931 42.9
1932 44.41
1933 41.8
1934 44.62
1935 44.22
1936 44.63
1937 47.45
1938 46.14
1939 48.76
1940 47.86
1941 49.67
1942 50.08
1943 50.59
1944 49.38
1945 49.39
1946 51.7
1947 50.7
1948 52.01
1949 54.23
1950 56.98
1951 57.48
1952 58.45
1953 59.38
1954 60.27
1955 61.12
1956 61.93
1957 62.69
1958 63.42
1959 64.09
1960 64.72
1961 65.31
1962 65.84
1963 66.33
1964 66.76
1965 67.17
1966 67.54
1967 67.88
1968 68.21
1969 68.5
1970 68.79
1971 69.23
1972 69.8
1973 70.29
1974 70.63
1975 70.91
1976 71.16
1977 71.33
1978 71.61
1979 71.73
1980 71.63
1981 71.98
1982 72.17
1983 72.35
1984 72.52
1985 72.69
1986 72.92
1987 73.36
1988 73.75
1989 74.14
1990 74.4
1991 74.52
1992 74.46
1993 74.38
1994 74.3
1995 74.18
1996 74.06
1997 73.94
1998 73.92
1999 73.9
2000 73.83
2001 73.64
2002 73.92
2003 74.12
2004 74.32
2005 74.66
2006 74.82
2007 74.73
2008 74.65
2009 74.6
2010 74.66
2011 74.77
2012 74.82
2013 74.86
2014 74.89
2015 74.91
2016 74.92
2017 75.05
2018 75.18