Year Measure
1770 1505
1780 1523
1790 1383
1791 1414
1792 1392
1793 1349
1794 1370
1795 1405
1796 1409
1797 1427
1798 1457
1799 1414
1800 1340
1801 1322
1802 1366
1803 1405
1804 1466
1805 1418
1806 1453
1807 1427
1808 1509
1809 1514
1810 1396
1811 1353
1812 1379
1813 1418
1814 1436
1815 1375
1816 1353
1817 1366
1818 1466
1819 1457
1820 1453
1821 1431
1822 1449
1823 1462
1824 1496
1825 1479
1826 1518
1827 1496
1828 1479
1829 1470
1830 1453
1831 1501
1832 1518
1833 1523
1834 1536
1835 1579
1836 1431
1837 1392
1838 1418
1839 1405
1840 1449
1841 1479
1842 1483
1843 1409
1844 1409
1845 1422
1846 1409
1847 1449
1848 1444
1849 1436
1850 1357
1851 1362
1852 1340
1853 1309
1854 1227
1855 1240
1856 1244
1857 1331
1858 1383
1859 1340
1860 1335
1861 1449
1862 1492
1863 1523
1864 1496
1865 1575
1866 1466
1867 1479
1868 1488
1869 1527
1870 1601
1871 1592
1872 1566
1873 1566
1874 1675
1875 1640
1876 1579
1877 1601
1878 1684
1879 1679
1880 1723
1881 1771
1882 1810
1883 1831
1884 1775
1885 1827
1886 1914
1887 1940
1888 1918
1889 1849
1890 1897
1891 1945
1892 1931
1893 1979
1894 1988
1895 2010
1896 2032
1897 2045
1898 2053
1899 2079
1900 2127
1901 2166
1902 2214
1903 2271
1904 2340
1905 2414
1906 2480
1907 2558
1908 2593
1909 2636
1910 2641
1911 2671
1912 2762
1913 2871
1914 3134
1915 3156
1916 3517
1917 3757
1918 4143
1919 3600
1920 3229
1921 3269
1922 3419
1923 3438
1924 3410
1925 3564
1926 3561
1927 3579
1928 3782
1929 3882
1930 3665
1931 3697
1932 3833
1933 3799
1934 3826
1935 4126
1936 4218
1937 4388
1938 4397
1939 4653
1940 4495
1941 4384
1942 4378
1943 4125
1944 3499
1945 2730
1946 3418
1947 3892
1948 4109
1949 4219
1950 4461
1951 4720
1952 4931
1953 5222
1954 5436
1955 5734
1956 5958
1957 6249
1958 6518
1959 6886
1960 7315
1961 7820
1962 8244
1963 8637
1964 8822
1965 9012
1966 9504
1967 10020
1968 10690
1969 11270
1970 11790
1971 11940
1972 12270
1973 13130
1974 13610
1975 13160
1976 14020
1977 14260
1978 14830
1979 15710
1980 16200
1981 16360
1982 16540
1983 16720
1984 17530
1985 18080
1986 18480
1987 19210
1988 20290
1989 21170
1990 21560
1991 21760
1992 22010
1993 21830
1994 22470
1995 23680
1996 23900
1997 24680
1998 25410
1999 26130
2000 27160
2001 27780
2002 27970
2003 27840
2004 27890
2005 27750
2006 28220
2007 28510
2008 27950
2009 26230
2010 26550
2011 26520
2012 25810
2013 25360
2014 25420
2015 25670
2016 25980
2017 26300
2018 26570