Year Years
1800 32.6
1801 32.6
1802 32.6
1803 32.6
1804 32.6
1805 32.6
1806 32.6
1807 32.6
1808 32.6
1809 32.6
1810 32.6
1811 32.6
1812 32.6
1813 32.6
1814 32.6
1815 32.6
1816 32.6
1817 32.6
1818 32.6
1819 32.6
1820 32.6
1821 32.6
1822 32.6
1823 32.6
1824 32.6
1825 32.6
1826 32.6
1827 32.6
1828 32.6
1829 32.6
1830 32.6
1831 32.6
1832 32.6
1833 32.6
1834 32.6
1835 32.6
1836 32.6
1837 32.6
1838 32.6
1839 32.6
1840 32.6
1841 32.6
1842 32.6
1843 32.6
1844 32.6
1845 32.6
1846 32.6
1847 32.6
1848 32.6
1849 32.6
1850 32.6
1851 32.6
1852 32.6
1853 32.6
1854 32.6
1855 32.6
1856 32.6
1857 32.6
1858 32.6
1859 32.6
1860 32.6
1861 32.6
1862 32.6
1863 32.6
1864 32.6
1865 32.6
1866 32.6
1867 32.6
1868 32.6
1869 32.6
1870 32.6
1871 32.64
1872 32.69
1873 32.73
1874 32.78
1875 32.82
1876 32.86
1877 32.91
1878 32.95
1879 33
1880 33.04
1881 33.08
1882 33.13
1883 33.17
1884 33.21
1885 33.26
1886 33.3
1887 33.35
1888 33.39
1889 33.43
1890 33.48
1891 33.52
1892 33.57
1893 33.61
1894 33.65
1895 33.7
1896 33.74
1897 33.79
1898 33.83
1899 33.87
1900 33.92
1901 33.96
1902 34
1903 34.05
1904 34.09
1905 34.14
1906 34.18
1907 34.22
1908 34.27
1909 34.31
1910 34.36
1911 34.4
1912 34.44
1913 34.49
1914 34.53
1915 34.58
1916 34.62
1917 34.66
1918 13.42
1919 34.75
1920 34.79
1921 34.84
1922 34.88
1923 34.93
1924 34.97
1925 35.01
1926 35.06
1927 35.1
1928 35.15
1929 35.19
1930 35.23
1931 35.28
1932 35.32
1933 35.37
1934 35.41
1935 35.45
1936 35.5
1937 35.54
1938 35.58
1939 35.63
1940 35.67
1941 35.72
1942 35.76
1943 35.8
1944 35.85
1945 35.89
1946 37.84
1947 39.79
1948 41.75
1949 43.71
1950 45.68
1951 45.97
1952 46.48
1953 47
1954 47.52
1955 48.04
1956 48.56
1957 49.08
1958 49.59
1959 50.09
1960 50.59
1961 51.07
1962 51.55
1963 52.02
1964 52.46
1965 52.93
1966 53.41
1967 53.93
1968 54.48
1969 55.06
1970 55.64
1971 56.08
1972 56.55
1973 56.99
1974 57.36
1975 57.64
1976 57.92
1977 58.03
1978 58.06
1979 58.16
1980 57.78
1981 57.72
1982 57.45
1983 57.25
1984 56.85
1985 56.31
1986 55.62
1987 55.03
1988 54.67
1989 53.54
1990 52.27
1991 50.82
1992 49.53
1993 48.58
1994 47.48
1995 46.45
1996 45.67
1997 45.14
1998 44.65
1999 44.26
2000 44.15
2001 43.87
2002 44.4
2003 44.6
2004 45.27
2005 45.99
2006 46.72
2007 47.81
2008 49.4
2009 50.72
2010 52.02
2011 53.19
2012 54.45
2013 55.7
2014 56.97
2015 58.08
2016 58.76
2017 59.13
2018 59.45