Year Measure
1820 989.4
1821 994.1
1822 998.7
1823 1003
1824 1008
1825 1013
1826 1018
1827 1022
1828 1027
1829 1032
1830 1037
1831 1042
1832 1047
1833 1051
1834 1056
1835 1061
1836 1066
1837 1071
1838 1076
1839 1081
1840 1086
1841 1092
1842 1097
1843 1102
1844 1107
1845 1112
1846 1117
1847 1123
1848 1128
1849 1133
1850 1139
1851 1144
1852 1149
1853 1155
1854 1160
1855 1165
1856 1171
1857 1176
1858 1182
1859 1187
1860 1193
1861 1199
1862 1204
1863 1210
1864 1216
1865 1221
1866 1227
1867 1233
1868 1239
1869 1244
1870 1250
1871 1256
1872 1262
1873 1268
1874 1274
1875 1280
1876 1286
1877 1292
1878 1298
1879 1304
1880 1310
1881 1316
1882 1322
1883 1329
1884 1335
1885 1341
1886 1347
1887 1354
1888 1360
1889 1366
1890 1373
1891 1379
1892 1386
1893 1392
1894 1399
1895 1405
1896 1412
1897 1419
1898 1425
1899 1432
1900 1439
1901 1445
1902 1452
1903 1459
1904 1466
1905 1473
1906 1480
1907 1486
1908 1493
1909 1500
1910 1507
1911 1515
1912 1522
1913 1529
1914 1547
1915 1566
1916 1586
1917 1605
1918 1625
1919 1645
1920 1665
1921 1685
1922 1706
1923 1727
1924 1748
1925 1769
1926 1791
1927 1813
1928 1835
1929 1857
1930 1880
1931 1903
1932 1926
1933 1950
1934 1974
1935 1998
1936 2022
1937 2047
1938 2072
1939 2098
1940 2123
1941 2149
1942 2176
1943 2202
1944 2229
1945 2256
1946 2284
1947 2312
1948 2340
1949 2369
1950 2398
1951 2447
1952 2435
1953 2437
1954 2491
1955 2491
1956 2498
1957 2517
1958 2513
1959 2586
1960 2674
1961 3196
1962 3129
1963 3495
1964 3162
1965 3180
1966 2993
1967 3063
1968 2800
1969 2895
1970 2837
1971 2935
1972 3187
1973 3544
1974 3872
1975 3823
1976 4383
1977 4592
1978 4684
1979 4761
1980 4206
1981 4383
1982 4564
1983 4535
1984 4702
1985 4982
1986 5427
1987 5919
1988 6264
1989 6477
1990 6865
1991 7229
1992 7497
1993 7917
1994 8188
1995 8394
1996 8747
1997 9189
1998 9657
1999 10080
2000 10260
2001 10890
2002 11160
2003 11840
2004 12290
2005 12570
2006 13030
2007 13670
2008 14380
2009 14700
2010 15240
2011 15760
2012 16190
2013 16600
2014 17130
2015 17730
2016 18390
2017 19060
2018 19740
2019 20450