Year Measure
1800 1490
1801 1491
1802 1492
1803 1493
1804 1494
1805 1495
1806 1496
1807 1497
1808 1498
1809 1499
1810 1500
1811 1501
1812 1502
1813 1503
1814 1504
1815 1505
1816 1506
1817 1508
1818 1509
1819 1510
1820 1511
1821 1521
1822 1531
1823 1541
1824 1552
1825 1562
1826 1572
1827 1583
1828 1594
1829 1604
1830 1615
1831 1626
1832 1637
1833 1648
1834 1659
1835 1670
1836 1681
1837 1692
1838 1704
1839 1715
1840 1727
1841 1738
1842 1750
1843 1762
1844 1774
1845 1786
1846 1797
1847 1810
1848 1822
1849 1834
1850 1846
1851 1859
1852 1871
1853 1884
1854 1896
1855 1909
1856 1922
1857 1935
1858 1948
1859 1961
1860 1974
1861 1987
1862 2000
1863 2014
1864 2027
1865 2041
1866 2055
1867 2069
1868 2082
1869 2096
1870 2110
1871 2131
1872 2152
1873 2174
1874 2195
1875 2217
1876 2239
1877 2261
1878 2283
1879 2306
1880 2329
1881 2352
1882 2375
1883 2398
1884 2422
1885 2446
1886 2470
1887 2494
1888 2519
1889 2544
1890 2569
1891 2595
1892 2620
1893 2646
1894 2672
1895 2699
1896 2725
1897 2752
1898 2779
1899 2807
1900 2835
1901 2863
1902 2891
1903 2919
1904 2948
1905 2977
1906 3007
1907 3037
1908 3067
1909 3097
1910 3128
1911 3158
1912 3190
1913 3221
1914 3099
1915 2982
1916 2869
1917 2761
1918 2878
1919 3001
1920 3128
1921 3261
1922 3400
1923 3457
1924 3514
1925 3572
1926 3632
1927 3692
1928 3754
1929 3816
1930 3880
1931 3944
1932 4010
1933 4076
1934 4144
1935 4213
1936 4283
1937 4355
1938 4427
1939 4501
1940 4575
1941 4652
1942 4729
1943 4808
1944 4888
1945 4969
1946 5051
1947 5135
1948 5221
1949 5308
1950 5396
1951 4712
1952 4873
1953 5460
1954 6099
1955 6413
1956 6095
1957 6036
1958 5041
1959 5321
1960 5316
1961 5513
1962 5570
1963 5463
1964 5630
1965 6012
1966 6231
1967 5759
1968 6290
1969 6242
1970 6480
1971 6898
1972 7543
1973 7679
1974 7701
1975 5290
1976 2203
1977 3756
1978 3817
1979 4280
1980 4496
1981 4491
1982 2823
1983 3385
1984 4864
1985 6035
1986 5648
1987 6560
1988 4709
1989 2702
1990 3519
1991 5001
1992 4289
1993 4414
1994 4625
1995 4851
1996 4941
1997 5424
1998 6112
1999 6491
2000 6832
2001 7590
2002 8517
2003 9361
2004 10900
2005 12040
2006 11920
2007 12740
2008 13740
2009 16180
2010 16460
2011 16430
2012 16520
2013 16530
2014 16530
2015 16780
2016 17290
2017 17810
2018 18350
2019 18900