Year Measure
1820 634.3
1821 634.4
1822 634.6
1823 634.7
1824 634.8
1825 634.9
1826 635
1827 635.1
1828 635.3
1829 635.4
1830 635.5
1831 635.6
1832 635.7
1833 635.9
1834 636
1835 636.1
1836 636.2
1837 636.3
1838 636.5
1839 636.6
1840 636.7
1841 636.8
1842 636.9
1843 637
1844 637.2
1845 637.3
1846 637.4
1847 637.5
1848 637.6
1849 637.8
1850 637.9
1851 638
1852 638.1
1853 638.2
1854 638.4
1855 638.5
1856 638.6
1857 638.7
1858 638.8
1859 639
1860 639.1
1861 639.2
1862 639.3
1863 639.4
1864 639.6
1865 639.7
1866 639.8
1867 639.9
1868 640
1869 640.2
1870 640.3
1871 640.4
1872 640.5
1873 640.6
1874 640.8
1875 640.9
1876 641
1877 641.1
1878 641.2
1879 641.4
1880 641.5
1881 641.6
1882 641.7
1883 641.8
1884 642
1885 642.1
1886 642.2
1887 642.3
1888 642.4
1889 642.6
1890 642.7
1891 642.8
1892 642.9
1893 643
1894 643.2
1895 643.3
1896 643.4
1897 643.5
1898 643.6
1899 643.8
1900 643.9
1901 644
1902 644.1
1903 644.2
1904 644.4
1905 644.5
1906 644.6
1907 644.7
1908 644.8
1909 645
1910 645.1
1911 645.2
1912 645.3
1913 645.4
1914 645.6
1915 645.7
1916 645.8
1917 645.9
1918 646
1919 646.2
1920 646.3
1921 646.4
1922 646.5
1923 646.7
1924 646.8
1925 646.9
1926 647
1927 647.1
1928 647.3
1929 647.4
1930 647.5
1931 647.6
1932 647.7
1933 647.9
1934 648
1935 648.1
1936 648.2
1937 648.3
1938 648.5
1939 648.6
1940 648.7
1941 648.8
1942 649
1943 649.1
1944 649.2
1945 649.3
1946 649.4
1947 649.6
1948 649.7
1949 649.8
1950 649.9
1951 660.6
1952 671.3
1953 682.5
1954 692.9
1955 704.5
1956 715.9
1957 727.7
1958 739.4
1959 751.9
1960 757.7
1961 747.3
1962 736.3
1963 769.9
1964 789.8
1965 784.3
1966 800.1
1967 808.8
1968 821
1969 799.1
1970 829.7
1971 839.3
1972 862.8
1973 822.6
1974 784
1975 872
1976 967.2
1977 1019
1978 978.2
1979 1196
1980 1040
1981 989.1
1982 917.1
1983 941.7
1984 966.5
1985 971.4
1986 1015
1987 1015
1988 995
1989 1076
1990 1063
1991 1032
1992 1097
1993 1049
1994 1053
1995 1103
1996 1125
1997 1173
1998 1202
1999 1253
2000 1268
2001 1388
2002 1412
2003 1476
2004 1474
2005 1524
2006 1555
2007 1572
2008 1600
2009 1621
2010 1664
2011 1658
2012 1608
2013 1587
2014 1638
2015 1668
2016 1696
2017 1721
2018 1748
2019 1770