Year	Measure
1800	1155
1801	1159
1802	1163
1803	1168
1804	1172
1805	1176
1806	1180
1807	1184
1808	1189
1809	1193
1810	1197
1811	1202
1812	1206
1813	1210
1814	1215
1815	1219
1816	1223
1817	1228
1818	1232
1819	1237
1820	1241
1821	1245
1822	1250
1823	1254
1824	1259
1825	1263
1826	1268
1827	1273
1828	1277
1829	1282
1830	1286
1831	1291
1832	1296
1833	1300
1834	1305
1835	1310
1836	1314
1837	1319
1838	1324
1839	1329
1840	1333
1841	1338
1842	1343
1843	1348
1844	1353
1845	1358
1846	1362
1847	1367
1848	1372
1849	1377
1850	1382
1851	1387
1852	1392
1853	1397
1854	1402
1855	1407
1856	1412
1857	1417
1858	1422
1859	1427
1860	1433
1861	1438
1862	1443
1863	1448
1864	1453
1865	1459
1866	1464
1867	1469
1868	1474
1869	1480
1870	1485
1871	1506
1872	1528
1873	1550
1874	1573
1875	1595
1876	1618
1877	1642
1878	1665
1879	1689
1880	1714
1881	1739
1882	1764
1883	1789
1884	1815
1885	1841
1886	1868
1887	1895
1888	1922
1889	1950
1890	1978
1891	2006
1892	2035
1893	2065
1894	2095
1895	2125
1896	2155
1897	2187
1898	2218
1899	2250
1900	2283
1901	2316
1902	2349
1903	2383
1904	2417
1905	2452
1906	2488
1907	2523
1908	2560
1909	2597
1910	2634
1911	2672
1912	2711
1913	2750
1914	2617
1915	2490
1916	2369
1917	2254
1918	2145
1919	2259
1920	2380
1921	2506
1922	2640
1923	2615
1924	2590
1925	2300
1926	2266
1927	2233
1928	2200
1929	1983
1930	1787
1931	1611
1932	1452
1933	1309
1934	1180
1935	1170
1936	1159
1937	1149
1938	1139
1939	1129
1940	1119
1941	1109
1942	1099
1943	1090
1944	1080
1945	1091
1946	1102
1947	1114
1948	1125
1949	1363
1950	1651
1951	2000
1952	2518
1953	3170
1954	3992
1955	5026
1956	6328
1957	7967
1958	10030
1959	12630
1960	15900
1961	20020
1962	25210
1963	31740
1964	39960
1965	50310
1966	63340
1967	79750
1968	100400
1969	126400
1970	159200
1971	160600
1972	163200
1973	165800
1974	162600
1975	160900
1976	164900
1977	145700
1978	150600
1979	148300
1980	134700
1981	122500
1982	102100
1983	89790
1984	85140
1985	76620
1986	75170
1987	70740
1988	71210
1989	72680
1990	72970
1991	70390
1992	77520
1993	75990
1994	76490
1995	77350
1996	79000
1997	99530
1998	106600
1999	107100
2000	111600
2001	111900
2002	116400
2003	114900
2004	125600
2005	118400
2006	126800
2007	125600
2008	125300
2009	121900
2010	127200
2011	133700
2012	132100
2013	127500
2014	123200
2015	122200
2016	122600
2017	125800
2018	131400
2019	137100