Year Years
1800 31
1801 31
1802 31
1803 31
1804 31
1805 31
1806 31
1807 31
1808 31
1809 31
1810 31
1811 31
1812 31
1813 31
1814 31
1815 31
1816 31
1817 31
1818 31
1819 31
1820 31
1821 31
1822 31
1823 31
1824 31
1825 31
1826 31
1827 31
1828 31
1829 31
1830 31
1831 31
1832 31
1833 31
1834 31
1835 31
1836 31
1837 31
1838 31
1839 31
1840 31
1841 31
1842 31
1843 31
1844 31
1845 31
1846 31
1847 31
1848 31
1849 31
1850 31
1851 31
1852 31
1853 31
1854 31
1855 31
1856 31
1857 31
1858 31
1859 31
1860 31
1861 31
1862 31
1863 31
1864 31
1865 31
1866 31
1867 31
1868 31
1869 31
1870 31
1871 31.01
1872 31.03
1873 31.04
1874 31.06
1875 31.07
1876 31.09
1877 31.1
1878 31.12
1879 31.13
1880 31.15
1881 31.16
1882 31.17
1883 31.19
1884 31.2
1885 31.22
1886 31.23
1887 31.25
1888 31.26
1889 31.28
1890 31.29
1891 31.31
1892 31.32
1893 31.33
1894 31.35
1895 31.36
1896 31.38
1897 31.39
1898 31.41
1899 31.42
1900 31.44
1901 31.45
1902 31.47
1903 31.48
1904 31.5
1905 31.51
1906 31.52
1907 31.54
1908 31.55
1909 31.57
1910 31.58
1911 31.6
1912 31.61
1913 31.63
1914 31.64
1915 31.66
1916 31.67
1917 31.68
1918 12.26
1919 31.71
1920 31.73
1921 31.74
1922 31.76
1923 31.77
1924 31.79
1925 31.8
1926 31.82
1927 31.83
1928 31.84
1929 31.86
1930 31.87
1931 31.89
1932 31.9
1933 31.92
1934 31.93
1935 31.95
1936 32.96
1937 33.98
1938 34.99
1939 36.01
1940 37.03
1941 38.05
1942 39.07
1943 40.09
1944 41.11
1945 42.13
1946 43.16
1947 44.18
1948 45.21
1949 46.23
1950 47.26
1951 47.49
1952 47.94
1953 48.42
1954 48.93
1955 49.47
1956 50.03
1957 50.63
1958 51.23
1959 51.86
1960 52.5
1961 53.13
1962 53.74
1963 54.33
1964 54.92
1965 55.49
1966 56.06
1967 56.64
1968 57.23
1969 57.84
1970 58.48
1971 59.23
1972 59.87
1973 60.49
1974 61.05
1975 61.6
1976 62.08
1977 62.58
1978 62.91
1979 63.1
1980 62.99
1981 62.78
1982 62.58
1983 62.26
1984 62.11
1985 62.4
1986 62.82
1987 63.15
1988 63.24
1989 62.29
1990 63.25
1991 63.44
1992 63.5
1993 63.53
1994 63.73
1995 63.78
1996 63.63
1997 63.66
1998 63.8
1999 64.17
2000 64.56
2001 64.99
2002 65.32
2003 65.75
2004 66.04
2005 66.14
2006 66.84
2007 67.32
2008 67.7
2009 68.44
2010 68.91
2011 69.29
2012 69.28
2013 69.71
2014 70.01
2015 70.29
2016 70.57
2017 70.71
2018 70.86