Year	Measure
1800	884.7
1801	883.7
1802	882.7
1803	881.7
1804	880.6
1805	879.6
1806	878.6
1807	877.6
1808	876.6
1809	875.5
1810	874.5
1811	873.5
1812	872.5
1813	871.5
1814	870.5
1815	869.4
1816	868.4
1817	867.4
1818	866.4
1819	865.4
1820	864.4
1821	863.4
1822	862.4
1823	861.4
1824	860.4
1825	859.4
1826	858.4
1827	857.4
1828	856.4
1829	855.4
1830	854.4
1831	853.4
1832	852.4
1833	851.4
1834	850.5
1835	849.5
1836	848.5
1837	847.5
1838	846.5
1839	845.5
1840	844.5
1841	843.6
1842	842.6
1843	841.6
1844	840.6
1845	839.6
1846	838.7
1847	837.7
1848	836.7
1849	835.7
1850	834.8
1851	833.8
1852	832.8
1853	831.9
1854	830.9
1855	829.9
1856	829
1857	828
1858	827.1
1859	826.1
1860	825.1
1861	824.2
1862	823.2
1863	822.3
1864	821.3
1865	820.3
1866	819.4
1867	818.4
1868	817.5
1869	816.5
1870	815.6
1871	814.6
1872	813.7
1873	812.8
1874	811.8
1875	810.9
1876	809.9
1877	809
1878	808
1879	807.1
1880	806.2
1881	805.2
1882	804.3
1883	803.4
1884	802.4
1885	801.5
1886	800.6
1887	799.6
1888	798.7
1889	797.8
1890	796.8
1891	795.9
1892	795
1893	794.1
1894	793.1
1895	792.2
1896	791.3
1897	790.4
1898	789.5
1899	788.6
1900	787.6
1901	790.2
1902	792.8
1903	795.3
1904	797.9
1905	800.5
1906	803.1
1907	805.7
1908	808.3
1909	811
1910	813.6
1911	816.2
1912	841.6
1913	864.5
1914	893.8
1915	1035
1916	1002
1917	1097
1918	1169
1919	1232
1920	1060
1921	1130
1922	1026
1923	1086
1924	1080
1925	1067
1926	1094
1927	1128
1928	1123
1929	1051
1930	983
1931	976.7
1932	966.8
1933	1156
1934	1142
1935	1231
1936	1331
1937	1457
1938	1520
1939	1361
1940	1524
1941	1533
1942	1513
1943	1523
1944	1446
1945	674
1946	682.3
1947	719.8
1948	774.8
1949	832.2
1950	874.3
1951	811.9
1952	868.2
1953	1123
1954	1137
1955	1206
1956	1191
1957	1287
1958	1289
1959	1263
1960	1222
1961	1242
1962	1219
1963	1342
1964	1416
1965	1449
1966	1594
1967	1650
1968	1801
1969	2025
1970	2167
1971	2454
1972	2790
1973	3361
1974	3711
1975	4149
1976	4658
1977	5010
1978	5421
1979	5553
1980	4940
1981	5201
1982	5526
1983	6124
1984	6660
1985	7019
1986	8050
1987	9154
1988	10300
1989	11070
1990	12160
1991	13390
1992	14260
1993	15370
1994	16920
1995	18580
1996	19540
1997	20370
1998	19470
1999	21080
2000	22310
2001	23060
2002	24830
2003	25590
2004	26640
2005	27370
2006	28290
2007	29550
2008	29080
2009	29200
2010	30990
2011	31330
2012	31820
2013	32570
2014	33630
2015	34760
2016	35910
2017	37120
2018	38350
2019	39620