Year Years
1800 32
1801 32
1802 32
1803 32
1804 32
1805 32
1806 32
1807 32
1808 32
1809 32
1810 32
1811 32
1812 32
1813 32
1814 32
1815 32
1816 32
1817 32
1818 32
1819 32
1820 32
1821 32
1822 32
1823 32
1824 32
1825 32
1826 32
1827 32
1828 32
1829 32
1830 32
1831 32
1832 32
1833 32
1834 32
1835 32
1836 32
1837 32
1838 32
1839 32
1840 32
1841 32
1842 32
1843 32
1844 32
1845 32
1846 32
1847 32
1848 32
1849 32
1850 32
1851 32
1852 32
1853 32
1854 32
1855 32
1856 32
1857 32
1858 32
1859 32
1860 32
1861 32
1862 32
1863 32
1864 32
1865 32
1866 32
1867 32
1868 32
1869 32
1870 32
1871 32.01
1872 32.01
1873 32.02
1874 32.03
1875 32.04
1876 32.04
1877 32.05
1878 32.06
1879 32.07
1880 32.07
1881 32.08
1882 32.09
1883 32.09
1884 32.1
1885 32.11
1886 32.12
1887 32.12
1888 32.13
1889 32.14
1890 32.15
1891 32.15
1892 32.16
1893 32.17
1894 32.17
1895 32.18
1896 32.19
1897 32.2
1898 32.2
1899 32.21
1900 32.22
1901 32.23
1902 32.23
1903 31.94
1904 31.64
1905 31.35
1906 31.05
1907 30.76
1908 31.05
1909 31.33
1910 31.62
1911 31.91
1912 32.2
1913 32.27
1914 32.34
1915 32.41
1916 32.48
1917 32.54
1918 28.58
1919 32.32
1920 32.2
1921 32.09
1922 31.97
1923 33.07
1924 34.17
1925 35.27
1926 36.38
1927 37.48
1928 37.83
1929 38.18
1930 38.54
1931 38.89
1932 39.24
1933 39.33
1934 39.42
1935 39.51
1936 39.6
1937 39.69
1938 40.7
1939 41.7
1940 42.71
1941 43.71
1942 44.72
1943 45.52
1944 46.33
1945 47.13
1946 47.93
1947 48.74
1948 50.94
1949 53.13
1950 55.33
1951 55.45
1952 55.69
1953 55.94
1954 56.21
1955 56.5
1956 56.81
1957 57.13
1958 57.46
1959 57.81
1960 58.2
1961 58.61
1962 59.04
1963 59.51
1964 60.01
1965 60.54
1966 61.08
1967 61.65
1968 62.22
1969 62.82
1970 63.43
1971 63.7
1972 63.96
1973 64.46
1974 66.32
1975 67.17
1976 67.51
1977 68.18
1978 68.79
1979 69.38
1980 70.21
1981 71.1
1982 71.48
1983 71.43
1984 71.6
1985 72.15
1986 72.98
1987 73.45
1988 73.44
1989 73.34
1990 73.52
1991 74.26
1992 74.93
1993 75.15
1994 75.31
1995 75.4
1996 75.71
1997 76.18
1998 76.54
1999 76.86
2000 77.24
2001 77.43
2002 77.66
2003 77.86
2004 78.06
2005 78.37
2006 78.68
2007 78.92
2008 79.2
2009 79.2
2010 79.12
2011 79.45
2012 79.59
2013 79.78
2014 80.01
2015 80.13
2016 80.24
2017 80.45
2018 80.66