Year Years
1800 30
1801 30
1802 30
1803 30
1804 30
1805 30
1806 30
1807 30
1808 30
1809 30
1810 30
1811 30
1812 30
1813 30
1814 30
1815 30
1816 30
1817 30
1818 30
1819 30
1820 30
1821 30
1822 30
1823 30
1824 30
1825 30
1826 30
1827 30
1828 30
1829 30
1830 30
1831 30
1832 30
1833 30
1834 30
1835 30
1836 30
1837 30
1838 30
1839 30
1840 30
1841 30
1842 30
1843 30
1844 30
1845 30
1846 30
1847 30
1848 30
1849 30
1850 30
1851 30
1852 30
1853 30
1854 30
1855 30
1856 30
1857 30
1858 30
1859 30
1860 30
1861 30
1862 30
1863 30
1864 30
1865 30
1866 30
1867 30
1868 30
1869 30
1870 30
1871 30.05
1872 30.09
1873 30.14
1874 30.18
1875 30.23
1876 30.27
1877 30.32
1878 30.36
1879 30.41
1880 30.45
1881 30.5
1882 30.54
1883 30.59
1884 30.63
1885 30.68
1886 30.72
1887 30.77
1888 30.81
1889 30.86
1890 30.9
1891 30.95
1892 30.99
1893 31.04
1894 31.08
1895 31.13
1896 31.17
1897 31.22
1898 31.26
1899 31.31
1900 31.35
1901 31.4
1902 31.44
1903 31.49
1904 31.53
1905 31.58
1906 31.62
1907 31.67
1908 31.72
1909 31.76
1910 31.81
1911 31.85
1912 31.9
1913 31.94
1914 31.99
1915 32.03
1916 32.08
1917 32.12
1918 12.44
1919 32.21
1920 32.26
1921 32.3
1922 32.35
1923 32.39
1924 32.44
1925 32.48
1926 32.53
1927 32.57
1928 32.62
1929 32.66
1930 32.71
1931 32.75
1932 32.8
1933 32.84
1934 32.89
1935 32.93
1936 32.98
1937 33.02
1938 33.07
1939 33.11
1940 33.16
1941 33.2
1942 33.25
1943 33.29
1944 33.34
1945 33.39
1946 33.43
1947 34.2
1948 34.98
1949 35.76
1950 36.53
1951 36.82
1952 37.33
1953 37.85
1954 38.36
1955 38.88
1956 39.38
1957 39.89
1958 40.4
1959 40.91
1960 41.43
1961 41.95
1962 42.5
1963 43.05
1964 43.64
1965 44.28
1966 44.95
1967 45.7
1968 46.49
1969 47.35
1970 48.26
1971 48.31
1972 48.3
1973 48.35
1974 48.37
1975 48.43
1976 48.57
1977 48.82
1978 49.05
1979 49.28
1980 49.63
1981 49.91
1982 50.19
1983 50.1
1984 50.05
1985 49.98
1986 49.83
1987 49.65
1988 49.05
1989 48.64
1990 48.21
1991 48.01
1992 47.84
1993 47.22
1994 46.75
1995 46.2
1996 45.63
1997 45.11
1998 44.92
1999 44.7
2000 44.48
2001 44.4
2002 44.52
2003 44.63
2004 44.77
2005 45.02
2006 45.32
2007 45.73
2008 46.34
2009 46.96
2010 47.48
2011 48.04
2012 48.63
2013 47.97
2014 48.35
2015 49.71
2016 50.25
2017 50.94
2018 51.58