Year Years
1800 33
1801 33
1802 33
1803 33
1804 33
1805 33
1806 33
1807 33
1808 33
1809 33
1810 33
1811 33
1812 33
1813 33
1814 33
1815 33
1816 33
1817 33
1818 33
1819 33
1820 33
1821 33
1822 33
1823 33
1824 33
1825 33
1826 33
1827 33
1828 33
1829 33
1830 33
1831 33
1832 33
1833 33
1834 33
1835 33
1836 33
1837 33
1838 33
1839 33
1840 33
1841 33
1842 33
1843 33
1844 33
1845 33
1846 33
1847 33
1848 33
1849 33
1850 33
1851 33
1852 33
1853 33
1854 33
1855 33
1856 33
1857 33
1858 33
1859 33
1860 33
1861 33.33
1862 33.66
1863 34
1864 34.33
1865 34.66
1866 34.99
1867 35.32
1868 35.66
1869 35.99
1870 36.32
1871 36.65
1872 36.98
1873 37.32
1874 37.65
1875 37.98
1876 38.31
1877 38.64
1878 38.97
1879 39.3
1880 39.63
1881 39.96
1882 40.3
1883 40.63
1884 40.96
1885 41.29
1886 41.62
1887 41.96
1888 42.28
1889 42.61
1890 42.94
1891 43.27
1892 43.61
1893 43.94
1894 44.27
1895 44.6
1896 44.93
1897 45.25
1898 45.55
1899 45.86
1900 46.17
1901 46.49
1902 46.8
1903 47.11
1904 47.42
1905 47.74
1906 48.04
1907 48.35
1908 48.66
1909 48.97
1910 49.29
1911 49.6
1912 49.91
1913 50.22
1914 49.46
1915 40.26
1916 40.06
1917 39.46
1918 35.47
1919 40.06
1920 47.66
1921 57.09
1922 55.51
1923 56.63
1924 53.64
1925 52.86
1926 55.81
1927 54.13
1928 54.83
1929 52.83
1930 55.95
1931 56.67
1932 56.54
1933 58.5
1934 55.46
1935 58
1936 57.48
1937 56.63
1938 59.85
1939 59.19
1940 51.93
1941 30.96
1942 43.14
1943 42.04
1944 23.46
1945 37.94
1946 54.89
1947 47.9
1948 58.58
1949 59.08
1950 59.62
1951 60.35
1952 61.75
1953 63.04
1954 64.23
1955 65.31
1956 66.28
1957 67.14
1958 67.9
1959 69.35
1960 70.18
1961 70.41
1962 69.78
1963 70.17
1964 71.41
1965 71.08
1966 71.05
1967 70.72
1968 70.34
1969 70.07
1970 70.09
1971 70.22
1972 69.9
1973 69.81
1974 69.63
1975 69.08
1976 69.15
1977 69.18
1978 69.02
1979 68.76
1980 68.9
1981 68.78
1982 69.35
1983 69.19
1984 69.22
1985 69.49
1986 70.69
1987 70.72
1988 70.75
1989 70.04
1990 69.46
1991 69.03
1992 68.38
1993 66.86
1994 65.86
1995 66.57
1996 68.5
1997 69.18
1998 68.95
1999 69.88
2000 70.42
2001 69.87
2002 70.22
2003 70.58
2004 70.93
2005 70.79
2006 70.45
2007 70.89
2008 71.89
2009 72.61
2010 73.06
2011 73.61
2012 74.03
2013 74.09
2014 74.61
2015 74.76
2016 74.87
2017 75
2018 75.13