Year Measure
1800 1343
1801 1345
1802 1347
1803 1350
1804 1352
1805 1354
1806 1357
1807 1359
1808 1361
1809 1364
1810 1366
1811 1368
1812 1371
1813 1373
1814 1375
1815 1378
1816 1380
1817 1382
1818 1385
1819 1387
1820 1389
1821 1442
1822 1451
1823 1432
1824 1456
1825 1451
1826 1456
1827 1485
1828 1495
1829 1461
1830 1470
1831 1459
1832 1501
1833 1483
1834 1552
1835 1532
1836 1523
1837 1553
1838 1553
1839 1560
1840 1600
1841 1585
1842 1580
1843 1659
1844 1719
1845 1749
1846 1771
1847 1749
1848 1825
1849 1917
1850 2006
1851 1889
1852 1937
1853 1928
1854 1918
1855 2105
1856 1963
1857 1972
1858 1936
1859 2043
1860 2003
1861 2012
1862 2051
1863 2159
1864 2119
1865 2171
1866 2156
1867 2136
1868 2154
1869 2258
1870 2335
1871 2326
1872 2439
1873 2406
1874 2456
1875 2477
1876 2503
1877 2407
1878 2476
1879 2534
1880 2576
1881 2581
1882 2653
1883 2726
1884 2713
1885 2704
1886 2781
1887 2854
1888 2851
1889 2868
1890 3020
1891 3062
1892 3117
1893 3158
1894 3197
1895 3337
1896 3421
1897 3458
1898 3471
1899 3575
1900 3658
1901 3769
1902 3819
1903 4006
1904 4054
1905 4085
1906 4158
1907 4267
1908 4353
1909 4470
1910 4553
1911 4746
1912 4697
1913 4827
1914 5078
1915 4673
1916 4820
1917 4486
1918 4295
1919 4800
1920 4971
1921 4771
1922 5202
1923 5699
1924 5669
1925 5488
1926 5771
1927 5854
1928 6022
1929 6396
1930 6739
1931 6771
1932 6540
1933 6702
1934 6853
1935 6960
1936 7090
1937 7219
1938 7349
1939 7653
1940 6542
1941 5856
1942 5934
1943 6521
1944 7125
1945 6521
1946 7445
1947 7788
1948 7925
1949 8404
1950 8996
1951 8999
1952 9036
1953 9485
1954 9602
1955 9646
1956 9715
1957 10420
1958 10600
1959 11330
1960 11570
1961 12240
1962 12830
1963 12830
1964 13940
1965 14480
1966 14770
1967 15160
1968 15710
1969 16650
1970 16880
1971 17230
1972 18060
1973 18630
1974 18390
1975 18240
1976 19400
1977 19680
1978 19930
1979 20620
1980 20530
1981 20380
1982 21040
1983 21610
1984 22600
1985 23590
1986 24450
1987 24520
1988 24830
1989 24910
1990 25210
1991 25500
1992 25960
1993 25880
1994 27260
1995 27990
1996 28660
1997 29490
1998 30060
1999 30770
2000 31810
2001 31960
2002 32040
2003 32090
2004 32690
2005 33630
2006 34660
2007 35090
2008 34630
2009 32460
2010 32830
2011 33040
2012 32730
2013 32940
2014 33270
2015 33670
2016 34070
2017 34480
2018 34900