Year	Measure
1800	796.6
1801	796.6
1802	796.6
1803	796.6
1804	796.6
1805	796.6
1806	796.6
1807	796.6
1808	796.6
1809	796.6
1810	796.6
1811	796.6
1812	796.6
1813	796.6
1814	796.6
1815	796.6
1816	796.6
1817	796.6
1818	796.6
1819	796.6
1820	796.6
1821	801.9
1822	807.2
1823	812.5
1824	817.9
1825	823.3
1826	828.7
1827	834.2
1828	839.7
1829	845.2
1830	850.8
1831	856.4
1832	862.1
1833	867.8
1834	873.5
1835	879.3
1836	885.1
1837	891
1838	896.9
1839	902.8
1840	908.7
1841	914.8
1842	920.8
1843	926.9
1844	933
1845	939.2
1846	945.4
1847	951.6
1848	957.9
1849	964.2
1850	970.6
1851	977
1852	983.5
1853	990
1854	996.5
1855	1003
1856	1010
1857	1016
1858	1023
1859	1030
1860	1037
1861	1044
1862	1050
1863	1057
1864	1064
1865	1071
1866	1078
1867	1086
1868	1093
1869	1100
1870	1107
1871	1115
1872	1122
1873	1129
1874	1137
1875	1144
1876	1152
1877	1160
1878	1167
1879	1175
1880	1183
1881	1190
1882	1198
1883	1206
1884	1214
1885	1222
1886	1230
1887	1238
1888	1247
1889	1255
1890	1263
1891	1272
1892	1280
1893	1288
1894	1297
1895	1305
1896	1314
1897	1323
1898	1331
1899	1340
1900	1349
1901	1358
1902	1367
1903	1376
1904	1385
1905	1394
1906	1404
1907	1413
1908	1422
1909	1432
1910	1441
1911	1451
1912	1460
1913	1470
1914	1506
1915	1543
1916	1580
1917	1619
1918	1659
1919	1700
1920	1741
1921	1784
1922	1828
1923	1872
1924	1918
1925	1965
1926	2013
1927	2063
1928	2113
1929	2165
1930	2218
1931	2273
1932	2328
1933	2385
1934	2444
1935	2504
1936	2565
1937	2628
1938	2692
1939	2758
1940	2826
1941	2895
1942	2966
1943	3039
1944	3113
1945	3190
1946	3268
1947	3348
1948	3430
1949	3514
1950	3600
1951	3688
1952	3779
1953	3871
1954	3966
1955	4063
1956	4163
1957	4265
1958	4370
1959	4477
1960	4586
1961	4699
1962	4814
1963	4932
1964	5053
1965	5177
1966	5304
1967	5434
1968	5567
1969	5703
1970	5843
1971	6123
1972	6412
1973	6803
1974	6919
1975	6484
1976	5906
1977	6391
1978	6710
1979	7554
1980	8185
1981	8703
1982	8838
1983	9548
1984	10390
1985	11380
1986	12600
1987	14020
1988	15430
1989	16590
1990	17120
1991	17390
1992	17280
1993	17810
1994	18460
1995	17240
1996	17910
1997	18330
1998	18660
1999	18980
2000	18850
2001	18900
2002	19050
2003	19750
2004	20880
2005	21570
2006	24000
2007	25390
2008	25490
2009	22520
2010	20600
2011	19990
2012	20550
2013	20640
2014	20980
2015	21380
2016	21850
2017	22330
2018	22820
2019	23320