Year Years
1800 30.2
1801 30.2
1802 30.2
1803 30.2
1804 30.2
1805 30.2
1806 30.2
1807 30.2
1808 30.2
1809 30.2
1810 30.2
1811 30.2
1812 30.2
1813 30.2
1814 30.2
1815 30.2
1816 30.2
1817 30.2
1818 30.2
1819 30.2
1820 30.2
1821 30.2
1822 30.2
1823 30.2
1824 30.2
1825 30.2
1826 30.2
1827 30.2
1828 30.2
1829 30.2
1830 30.2
1831 30.2
1832 30.2
1833 30.2
1834 30.2
1835 30.2
1836 30.2
1837 30.2
1838 30.2
1839 30.2
1840 30.2
1841 30.2
1842 30.2
1843 30.2
1844 30.2
1845 30.2
1846 30.2
1847 30.2
1848 30.2
1849 30.2
1850 30.2
1851 30.2
1852 30.2
1853 30.2
1854 30.2
1855 30.2
1856 30.2
1857 30.2
1858 30.2
1859 30.2
1860 30.2
1861 30.2
1862 30.2
1863 30.2
1864 30.2
1865 30.2
1866 30.2
1867 30.2
1868 30.2
1869 30.2
1870 30.2
1871 30.24
1872 30.27
1873 30.31
1874 30.34
1875 30.38
1876 30.42
1877 30.45
1878 30.49
1879 30.52
1880 30.56
1881 30.59
1882 30.63
1883 30.67
1884 30.7
1885 30.74
1886 30.77
1887 30.81
1888 30.85
1889 30.88
1890 30.92
1891 30.95
1892 30.99
1893 31.02
1894 31.06
1895 31.1
1896 31.13
1897 31.17
1898 31.2
1899 31.24
1900 31.28
1901 31.31
1902 31.35
1903 31.38
1904 31.42
1905 31.46
1906 31.49
1907 31.53
1908 31.56
1909 31.6
1910 31.63
1911 31.67
1912 31.71
1913 31.74
1914 31.78
1915 31.81
1916 31.85
1917 31.89
1918 12.35
1919 31.96
1920 31.99
1921 32.03
1922 32.07
1923 32.1
1924 32.14
1925 32.17
1926 32.21
1927 32.24
1928 32.28
1929 32.32
1930 32.35
1931 32.39
1932 32.42
1933 32.46
1934 32.5
1935 32.53
1936 32.57
1937 32.6
1938 32.64
1939 32.67
1940 32.71
1941 32.75
1942 32.78
1943 32.82
1944 32.85
1945 32.89
1946 34.07
1947 35.25
1948 36.45
1949 37.64
1950 38.83
1951 38.98
1952 39.23
1953 39.48
1954 39.73
1955 40
1956 40.26
1957 40.53
1958 40.79
1959 41.08
1960 41.36
1961 41.67
1962 42
1963 42.34
1964 42.71
1965 43.1
1966 43.51
1967 43.96
1968 44.41
1969 44.87
1970 45.34
1971 45.69
1972 46.05
1973 46.41
1974 46.78
1975 47.09
1976 47.43
1977 47.72
1978 47.98
1979 48.25
1980 48.51
1981 48.93
1982 49.33
1983 49.59
1984 49.75
1985 49.88
1986 50.4
1987 50.92
1988 51.39
1989 51.77
1990 52.35
1991 52.99
1992 54.04
1993 55.04
1994 55.79
1995 56.56
1996 57.19
1997 57.84
1998 58.38
1999 49.62
2000 58.15
2001 59.51
2002 59.8
2003 60.03
2004 60.26
2005 60.45
2006 60.78
2007 61.04
2008 61.24
2009 61.48
2010 61.66
2011 62
2012 62.33
2013 62.62
2014 63
2015 63.35
2016 63.7
2017 64.14
2018 64.56