Year Years
1800 32.4
1801 32.4
1802 32.4
1803 32.4
1804 32.4
1805 32.4
1806 32.4
1807 32.4
1808 32.4
1809 32.4
1810 32.4
1811 32.4
1812 32.4
1813 32.4
1814 32.4
1815 32.4
1816 32.4
1817 32.4
1818 32.4
1819 32.4
1820 32.4
1821 32.4
1822 32.4
1823 32.4
1824 32.4
1825 32.4
1826 32.4
1827 32.4
1828 32.4
1829 32.4
1830 32.4
1831 32.4
1832 32.4
1833 32.4
1834 32.4
1835 32.4
1836 32.4
1837 32.4
1838 32.4
1839 32.4
1840 32.4
1841 32.4
1842 32.4
1843 32.4
1844 32.4
1845 32.4
1846 32.4
1847 32.4
1848 32.4
1849 32.4
1850 32.4
1851 32.4
1852 32.4
1853 32.4
1854 32.4
1855 32.4
1856 32.4
1857 32.4
1858 32.4
1859 32.4
1860 32.4
1861 32.4
1862 32.4
1863 32.4
1864 32.4
1865 32.4
1866 32.4
1867 32.4
1868 32.4
1869 32.4
1870 32.4
1871 32.44
1872 32.47
1873 32.51
1874 32.54
1875 32.58
1876 32.61
1877 32.65
1878 32.68
1879 32.72
1880 32.75
1881 32.79
1882 32.83
1883 32.86
1884 32.9
1885 32.93
1886 32.97
1887 33
1888 33.04
1889 33.07
1890 33.11
1891 33.14
1892 33.18
1893 33.22
1894 33.25
1895 33.29
1896 33.32
1897 33.36
1898 33.39
1899 33.43
1900 33.46
1901 33.5
1902 33.54
1903 30.05
1904 5.19
1905 10.38
1906 20.79
1907 28.09
1908 33.75
1909 33.78
1910 33.82
1911 33.85
1912 33.89
1913 33.93
1914 33.96
1915 34
1916 34.03
1917 34.07
1918 13.19
1919 34.14
1920 34.17
1921 34.21
1922 34.24
1923 34.28
1924 34.32
1925 34.35
1926 34.39
1927 34.42
1928 34.46
1929 34.49
1930 34.53
1931 34.56
1932 34.6
1933 34.63
1934 34.67
1935 34.71
1936 34.74
1937 34.78
1938 34.81
1939 34.85
1940 34.88
1941 35.77
1942 36.65
1943 37.54
1944 38.42
1945 39.31
1946 40.2
1947 41.1
1948 41.98
1949 42.88
1950 43.78
1951 44.23
1952 45.11
1953 45.96
1954 46.79
1955 47.62
1956 48.43
1957 49.23
1958 50.02
1959 50.78
1960 51.53
1961 52.27
1962 52.98
1963 53.68
1964 54.36
1965 55.04
1966 55.7
1967 56.36
1968 57.01
1969 57.67
1970 58.33
1971 58.52
1972 58.68
1973 58.82
1974 58.98
1975 59.11
1976 59.2
1977 59.28
1978 59.11
1979 59.25
1980 59.33
1981 59.6
1982 59.8
1983 60.23
1984 60.63
1985 60.87
1986 61.17
1987 61.51
1988 61.49
1989 61.56
1990 61.5
1991 61.66
1992 61.58
1993 61.42
1994 60.59
1995 59.91
1996 58.87
1997 57.71
1998 56.37
1999 55.03
2000 53.65
2001 52.89
2002 51.99
2003 51.48
2004 51.3
2005 51.65
2006 52.53
2007 54.06
2008 55.63
2009 57.18
2010 58.6
2011 60.09
2012 61.74
2013 62.73
2014 63.66
2015 64.29
2016 64.85
2017 65.32
2018 65.69