Year Measure
1820 628
1821 631
1822 633.9
1823 636.9
1824 639.9
1825 642.9
1826 645.9
1827 648.9
1828 652
1829 655
1830 658.1
1831 661.2
1832 664.3
1833 667.4
1834 670.5
1835 673.7
1836 676.8
1837 680
1838 683.2
1839 686.4
1840 689.6
1841 692.9
1842 696.1
1843 699.4
1844 702.7
1845 706
1846 709.3
1847 712.6
1848 715.9
1849 719.3
1850 722.7
1851 726
1852 729.5
1853 732.9
1854 736.3
1855 739.8
1856 743.2
1857 746.7
1858 750.2
1859 753.7
1860 757.3
1861 760.8
1862 764.4
1863 768
1864 771.6
1865 775.2
1866 778.8
1867 782.5
1868 786.1
1869 789.8
1870 793.5
1871 797.3
1872 801
1873 804.8
1874 808.5
1875 812.3
1876 816.1
1877 820
1878 823.8
1879 827.7
1880 831.5
1881 835.4
1882 839.4
1883 843.3
1884 847.2
1885 851.2
1886 855.2
1887 859.2
1888 863.3
1889 867.3
1890 871.4
1891 875.5
1892 879.6
1893 883.7
1894 887.8
1895 892
1896 896.2
1897 900.4
1898 904.6
1899 908.8
1900 913.1
1901 917.4
1902 921.7
1903 926
1904 930.3
1905 934.7
1906 939.1
1907 943.5
1908 947.9
1909 952.4
1910 956.8
1911 961.3
1912 965.8
1913 970.4
1914 977.1
1915 983.8
1916 990.7
1917 997.5
1918 1004
1919 1011
1920 1018
1921 1025
1922 1033
1923 1040
1924 1047
1925 1054
1926 1061
1927 1069
1928 1076
1929 1084
1930 1091
1931 1099
1932 1106
1933 1114
1934 1122
1935 1129
1936 1137
1937 1145
1938 1153
1939 1161
1940 1169
1941 1177
1942 1185
1943 1194
1944 1202
1945 1210
1946 1219
1947 1227
1948 1236
1949 1244
1950 1253
1951 1229
1952 1205
1953 1149
1954 1158
1955 1135
1956 1112
1957 1088
1958 1105
1959 1122
1960 1131
1961 1141
1962 1077
1963 1101
1964 1148
1965 1179
1966 1193
1967 1175
1968 1190
1969 1194
1970 1188
1971 1162
1972 1232
1973 1227
1974 1104
1975 1121
1976 1137
1977 1167
1978 1171
1979 1229
1980 1309
1981 1346
1982 1449
1983 1346
1984 1411
1985 1471
1986 1458
1987 1390
1988 1387
1989 1314
1990 1322
1991 1340
1992 1351
1993 1336
1994 1325
1995 1335
1996 1363
1997 1398
1998 1420
1999 1444
2000 1483
2001 1512
2002 1557
2003 1572
2004 1576
2005 1577
2006 1586
2007 1610
2008 1642
2009 1637
2010 1632
2011 1643
2012 1685
2013 1734
2014 1782
2015 1828
2016 1870
2017 1913
2018 1960
2019 2009