Year	Measure
1800	1200
1801	1201
1802	1202
1803	1203
1804	1205
1805	1206
1806	1207
1807	1208
1808	1210
1809	1211
1810	1212
1811	1214
1812	1215
1813	1216
1814	1217
1815	1219
1816	1220
1817	1221
1818	1222
1819	1224
1820	1225
1821	1233
1822	1241
1823	1248
1824	1256
1825	1264
1826	1272
1827	1280
1828	1288
1829	1297
1830	1305
1831	1313
1832	1321
1833	1330
1834	1338
1835	1347
1836	1355
1837	1364
1838	1372
1839	1381
1840	1390
1841	1399
1842	1407
1843	1416
1844	1425
1845	1434
1846	1443
1847	1453
1848	1462
1849	1471
1850	1480
1851	1490
1852	1499
1853	1509
1854	1518
1855	1528
1856	1538
1857	1547
1858	1557
1859	1567
1860	1577
1861	1587
1862	1597
1863	1607
1864	1617
1865	1627
1866	1638
1867	1648
1868	1659
1869	1669
1870	1680
1871	1690
1872	1701
1873	1712
1874	1723
1875	1733
1876	1744
1877	1755
1878	1767
1879	1778
1880	1789
1881	1800
1882	1812
1883	1823
1884	1835
1885	1846
1886	1775
1887	2076
1888	1997
1889	1857
1890	1849
1891	1694
1892	1854
1893	2101
1894	2389
1895	2211
1896	2435
1897	2394
1898	2458
1899	2608
1900	2552
1901	2615
1902	2842
1903	2646
1904	2926
1905	2590
1906	2475
1907	2379
1908	2598
1909	2697
1910	2878
1911	2659
1912	2873
1913	3018
1914	2882
1915	2966
1916	2637
1917	2315
1918	1417
1919	1222
1920	1227
1921	1123
1922	1304
1923	1502
1924	1902
1925	2377
1926	2669
1927	2780
1928	2924
1929	2958
1930	3091
1931	3119
1932	3071
1933	3187
1934	3479
1935	3978
1936	4249
1937	4601
1938	4588
1939	4774
1940	4575
1941	4489
1942	4405
1943	4322
1944	4241
1945	4162
1946	4084
1947	4537
1948	5126
1949	5599
1950	6065
1951	5989
1952	6268
1953	6430
1954	6630
1955	7071
1956	7612
1957	7632
1958	8062
1959	7831
1960	8421
1961	8746
1962	8837
1963	8506
1964	9474
1965	9890
1966	10250
1967	10590
1968	11100
1969	11150
1970	11900
1971	12100
1972	12040
1973	12930
1974	13060
1975	12860
1976	13220
1977	13290
1978	13390
1979	13100
1980	12890
1981	12790
1982	12880
1983	13060
1984	12980
1985	12870
1986	13160
1987	13100
1988	13150
1989	13170
1990	12650
1991	11190
1992	10570
1993	9649
1994	8573
1995	8021
1996	8155
1997	8407
1998	8375
1999	8694
2000	9580
2001	10860
2002	11900
2003	12980
2004	14160
2005	15530
2006	17030
2007	18330
2008	18700
2009	18680
2010	19710
2011	20770
2012	21500
2013	22460
2014	23390
2015	24480
2016	25500
2017	26520
2018	27560
2019	28630