Year Measure
1800 1316
1801 1318
1802 1320
1803 1323
1804 1325
1805 1327
1806 1329
1807 1332
1808 1334
1809 1336
1810 1338
1811 1341
1812 1343
1813 1345
1814 1348
1815 1350
1816 1352
1817 1354
1818 1357
1819 1359
1820 1361
1821 1368
1822 1375
1823 1382
1824 1389
1825 1397
1826 1404
1827 1411
1828 1418
1829 1426
1830 1433
1831 1440
1832 1448
1833 1455
1834 1463
1835 1470
1836 1478
1837 1485
1838 1493
1839 1501
1840 1508
1841 1516
1842 1524
1843 1532
1844 1540
1845 1548
1846 1555
1847 1563
1848 1572
1849 1580
1850 1588
1851 1596
1852 1604
1853 1612
1854 1621
1855 1629
1856 1638
1857 1646
1858 1655
1859 1663
1860 1672
1861 1669
1862 1562
1863 1669
1864 1688
1865 1658
1866 1670
1867 1544
1868 1749
1869 1920
1870 1986
1871 1964
1872 1996
1873 2080
1874 2099
1875 2111
1876 2195
1877 2111
1878 2044
1879 2035
1880 2013
1881 1935
1882 2097
1883 2144
1884 2125
1885 2146
1886 2223
1887 2223
1888 2270
1889 2312
1890 2407
1891 2354
1892 2231
1893 2337
1894 2439
1895 2601
1896 2736
1897 2831
1898 2908
1899 2801
1900 2908
1901 2852
1902 2774
1903 2938
1904 3017
1905 3036
1906 3127
1907 3197
1908 3188
1909 3284
1910 3323
1911 3380
1912 3525
1913 3679
1914 3487
1915 3280
1916 3299
1917 2755
1918 2388
1919 2890
1920 3217
1921 3285
1922 3587
1923 3812
1924 3876
1925 4058
1926 4169
1927 4457
1928 4719
1929 4735
1930 4646
1931 4498
1932 4444
1933 4709
1934 5209
1935 5390
1936 5715
1937 5998
1938 6256
1939 5939
1940 5613
1941 5790
1942 5799
1943 6443
1944 6422
1945 6012
1946 6419
1947 6478
1948 6897
1949 7222
1950 7413
1951 7967
1952 8147
1953 8108
1954 8718
1955 9058
1956 9230
1957 9569
1958 9542
1959 10030
1960 10860
1961 11600
1962 11890
1963 12190
1964 12740
1965 13370
1966 13640
1967 13850
1968 14110
1969 15470
1970 16690
1971 17020
1972 18210
1973 19320
1974 19800
1975 19940
1976 19800
1977 19790
1978 20150
1979 21490
1980 22570
1981 22890
1982 23500
1983 24000
1984 24590
1985 25310
1986 25830
1987 26810
1988 28040
1989 29540
1990 29400
1991 27370
1992 26180
1993 25740
1994 26640
1995 27460
1996 28410
1997 30090
1998 31710
1999 32870
2000 34460
2001 35290
2002 35770
2003 36330
2004 37600
2005 38640
2006 40180
2007 42140
2008 42060
2009 38280
2010 39380
2011 40280
2012 39690
2013 38960
2014 38920
2015 39170
2016 39610
2017 40110
2018 40670
2019 41240