Year Measure
1820 1138
1821 1143
1822 1149
1823 1154
1824 1160
1825 1165
1826 1171
1827 1177
1828 1182
1829 1188
1830 1194
1831 1199
1832 1205
1833 1211
1834 1217
1835 1223
1836 1228
1837 1234
1838 1240
1839 1246
1840 1252
1841 1258
1842 1264
1843 1270
1844 1276
1845 1282
1846 1289
1847 1295
1848 1301
1849 1307
1850 1313
1851 1320
1852 1326
1853 1332
1854 1339
1855 1345
1856 1352
1857 1358
1858 1365
1859 1371
1860 1378
1861 1384
1862 1391
1863 1398
1864 1404
1865 1411
1866 1418
1867 1425
1868 1431
1869 1438
1870 1445
1871 1467
1872 1489
1873 1511
1874 1534
1875 1557
1876 1580
1877 1604
1878 1628
1879 1652
1880 1677
1881 1702
1882 1728
1883 1753
1884 1780
1885 1806
1886 1833
1887 1861
1888 1889
1889 1917
1890 1946
1891 1961
1892 1977
1893 1992
1894 2008
1895 2024
1896 2039
1897 2055
1898 2072
1899 2088
1900 2104
1901 2141
1902 2179
1903 2217
1904 2256
1905 2296
1906 2336
1907 2377
1908 2419
1909 2462
1910 2505
1911 2549
1912 2594
1913 2639
1914 2517
1915 2400
1916 2288
1917 2182
1918 2080
1919 1984
1920 1892
1921 1804
1922 1720
1923 1640
1924 1564
1925 1587
1926 2012
1927 2159
1928 2098
1929 2031
1930 2210
1931 2501
1932 2485
1933 2494
1934 2252
1935 2126
1936 2569
1937 2695
1938 2744
1939 2757
1940 2664
1941 2696
1942 2546
1943 2604
1944 2387
1945 1846
1946 2012
1947 2193
1948 2391
1949 2606
1950 2841
1951 3422
1952 3258
1953 3588
1954 3484
1955 3695
1956 3661
1957 4010
1958 4315
1959 4617
1960 5010
1961 5286
1962 5670
1963 5881
1964 6293
1965 6624
1966 7098
1967 7433
1968 7516
1969 7821
1970 8213
1971 8434
1972 8793
1973 9092
1974 9315
1975 10030
1976 10290
1977 10140
1978 10360
1979 10750
1980 10400
1981 10640
1982 10960
1983 10730
1984 11060
1985 10710
1986 10980
1987 10980
1988 10900
1989 10700
1990 9630
1991 8943
1992 8400
1993 8486
1994 8730
1995 9090
1996 8331
1997 7957
1998 8373
1999 8651
2000 9205
2001 9682
2002 10260
2003 10800
2004 11620
2005 12460
2006 13340
2007 14280
2008 15230
2009 14480
2010 14650
2011 15280
2012 15460
2013 15690
2014 16020
2015 16500
2016 17090
2017 17690
2018 18310
2019 18950