Year Measure
1820 591.6
1821 593.1
1822 594.6
1823 596.1
1824 597.6
1825 599.2
1826 600.7
1827 602.2
1828 603.7
1829 605.3
1830 606.8
1831 608.3
1832 609.9
1833 611.4
1834 613
1835 614.5
1836 616.1
1837 617.7
1838 619.2
1839 620.8
1840 622.4
1841 623.9
1842 625.5
1843 627.1
1844 628.7
1845 630.3
1846 631.9
1847 633.5
1848 635.1
1849 636.7
1850 638.3
1851 640
1852 641.6
1853 643.2
1854 644.8
1855 646.5
1856 648.1
1857 649.8
1858 651.4
1859 653.1
1860 654.7
1861 656.4
1862 658
1863 659.7
1864 661.4
1865 663.1
1866 664.7
1867 666.4
1868 668.1
1869 669.8
1870 671.5
1871 673.2
1872 674.9
1873 676.6
1874 678.4
1875 680.1
1876 681.8
1877 683.5
1878 685.3
1879 687
1880 688.7
1881 690.5
1882 692.2
1883 694
1884 695.8
1885 697.5
1886 699.3
1887 701.1
1888 702.8
1889 704.6
1890 706.4
1891 708.2
1892 710
1893 711.8
1894 713.6
1895 715.4
1896 717.2
1897 719.1
1898 720.9
1899 722.7
1900 724.5
1901 726.4
1902 728.2
1903 730.1
1904 731.9
1905 733.8
1906 735.6
1907 737.5
1908 739.4
1909 741.2
1910 743.1
1911 745
1912 746.9
1913 748.8
1914 750.7
1915 752.6
1916 754.5
1917 756.4
1918 758.3
1919 760.3
1920 762.2
1921 764.1
1922 766.1
1923 768
1924 770
1925 771.9
1926 773.9
1927 775.8
1928 777.8
1929 779.8
1930 781.7
1931 783.7
1932 785.7
1933 787.7
1934 789.7
1935 791.7
1936 793.7
1937 795.7
1938 797.8
1939 799.8
1940 801.8
1941 803.8
1942 805.9
1943 807.9
1944 810
1945 812
1946 814.1
1947 816.2
1948 818.2
1949 820.3
1950 822.4
1951 904.3
1952 900.9
1953 847.7
1954 893.9
1955 892.6
1956 880.3
1957 878.1
1958 862.2
1959 880.2
1960 891.1
1961 856.2
1962 907.6
1963 936.9
1964 959.4
1965 964.8
1966 1056
1967 1066
1968 1088
1969 1075
1970 1103
1971 1115
1972 1151
1973 1150
1974 1141
1975 1165
1976 1212
1977 1210
1978 1208
1979 1188
1980 1163
1981 1117
1982 1099
1983 1062
1984 1057
1985 1024
1986 1027
1987 1046
1988 1057
1989 1062
1990 1070
1991 1062
1992 1038
1993 1016
1994 994.2
1995 998.1
1996 1023
1997 992
1998 1003
1999 1013
2000 1039
2001 1078
2002 1130
2003 1169
2004 1222
2005 1280
2006 1329
2007 1384
2008 1445
2009 1487
2010 1545
2011 1596
2012 1667
2013 1731
2014 1801
2015 1871
2016 1946
2017 2021
2018 2097
2019 2175