Year Measure
1800 1251
1801 1251
1802 1251
1803 1251
1804 1251
1805 1251
1806 1251
1807 1251
1808 1251
1809 1251
1810 1251
1811 1251
1812 1251
1813 1251
1814 1251
1815 1251
1816 1251
1817 1251
1818 1251
1819 1251
1820 1251
1821 1253
1822 1256
1823 1258
1824 1260
1825 1262
1826 1264
1827 1267
1828 1269
1829 1271
1830 1273
1831 1275
1832 1278
1833 1280
1834 1282
1835 1284
1836 1287
1837 1289
1838 1291
1839 1293
1840 1296
1841 1298
1842 1300
1843 1302
1844 1305
1845 1307
1846 1309
1847 1311
1848 1314
1849 1316
1850 1318
1851 1321
1852 1323
1853 1325
1854 1327
1855 1330
1856 1332
1857 1334
1858 1337
1859 1339
1860 1341
1861 1344
1862 1346
1863 1348
1864 1351
1865 1353
1866 1355
1867 1358
1868 1360
1869 1363
1870 1365
1871 1374
1872 1383
1873 1393
1874 1402
1875 1411
1876 1421
1877 1430
1878 1440
1879 1450
1880 1459
1881 1469
1882 1479
1883 1489
1884 1499
1885 1509
1886 1519
1887 1529
1888 1540
1889 1550
1890 1560
1891 1571
1892 1581
1893 1592
1894 1603
1895 1613
1896 1624
1897 1635
1898 1646
1899 1657
1900 1668
1901 1680
1902 1691
1903 1702
1904 1714
1905 1725
1906 1737
1907 1748
1908 1760
1909 1772
1910 1784
1911 1796
1912 1808
1913 1820
1914 1858
1915 1897
1916 1936
1917 1977
1918 2018
1919 2060
1920 2104
1921 2147
1922 2192
1923 2238
1924 2285
1925 2333
1926 2382
1927 2431
1928 2482
1929 2534
1930 2587
1931 2641
1932 2696
1933 2753
1934 2810
1935 2869
1936 2929
1937 2990
1938 3053
1939 3116
1940 3182
1941 3248
1942 3316
1943 3385
1944 3456
1945 3528
1946 3602
1947 3677
1948 3754
1949 3833
1950 3913
1951 3808
1952 3707
1953 3612
1954 3517
1955 3423
1956 3627
1957 4021
1958 4364
1959 4605
1960 4907
1961 5171
1962 5120
1963 5520
1964 5748
1965 6265
1966 6689
1967 7228
1968 8078
1969 8868
1970 9531
1971 10430
1972 11800
1973 12460
1974 12920
1975 13230
1976 15000
1977 14370
1978 12360
1979 10990
1980 9229
1981 8609
1982 9497
1983 10310
1984 9950
1985 9728
1986 8502
1987 8185
1988 7547
1989 7642
1990 8286
1991 8990
1992 9402
1993 9100
1994 9151
1995 9292
1996 9709
1997 9916
1998 10040
1999 10260
2000 10430
2001 10560
2002 11250
2003 12000
2004 12460
2005 12960
2006 13600
2007 14550
2008 14630
2009 15030
2010 15700
2011 15970
2012 14880
2013 14450
2014 14480
2015 14630
2016 14780
2017 14930
2018 15080
2019 15240