Year	Measure
1800	961.5
1801	961.5
1802	961.5
1803	961.5
1804	961.5
1805	961.5
1806	961.5
1807	961.5
1808	961.5
1809	961.5
1810	961.5
1811	961.5
1812	961.5
1813	961.5
1814	961.5
1815	961.5
1816	961.5
1817	961.5
1818	961.5
1819	961.5
1820	961.5
1821	967.9
1822	974.3
1823	980.7
1824	987.2
1825	993.7
1826	1000
1827	1007
1828	1014
1829	1020
1830	1027
1831	1034
1832	1041
1833	1047
1834	1054
1835	1061
1836	1068
1837	1075
1838	1083
1839	1090
1840	1097
1841	1104
1842	1111
1843	1119
1844	1126
1845	1134
1846	1141
1847	1149
1848	1156
1849	1164
1850	1172
1851	1179
1852	1187
1853	1195
1854	1203
1855	1211
1856	1219
1857	1227
1858	1235
1859	1243
1860	1251
1861	1260
1862	1268
1863	1276
1864	1285
1865	1293
1866	1302
1867	1310
1868	1319
1869	1328
1870	1337
1871	1345
1872	1354
1873	1363
1874	1372
1875	1381
1876	1390
1877	1400
1878	1409
1879	1418
1880	1428
1881	1437
1882	1446
1883	1456
1884	1466
1885	1475
1886	1485
1887	1495
1888	1505
1889	1515
1890	1525
1891	1535
1892	1545
1893	1555
1894	1565
1895	1576
1896	1586
1897	1597
1898	1607
1899	1618
1900	1629
1901	1639
1902	1650
1903	1661
1904	1672
1905	1683
1906	1694
1907	1705
1908	1717
1909	1728
1910	1739
1911	1751
1912	1762
1913	1774
1914	1801
1915	1827
1916	1855
1917	1882
1918	1910
1919	1939
1920	1968
1921	1997
1922	2027
1923	2057
1924	2087
1925	2118
1926	2150
1927	2182
1928	2215
1929	2247
1930	2281
1931	2315
1932	2349
1933	2384
1934	2420
1935	2456
1936	2493
1937	2530
1938	2567
1939	2606
1940	2644
1941	2684
1942	2724
1943	2764
1944	2805
1945	2847
1946	2890
1947	2933
1948	2976
1949	3021
1950	3066
1951	3221
1952	3384
1953	3556
1954	3736
1955	3925
1956	4124
1957	4333
1958	4553
1959	4783
1960	5026
1961	5396
1962	5861
1963	5539
1964	5791
1965	6430
1966	6667
1967	7358
1968	7848
1969	8412
1970	9175
1971	9272
1972	9309
1973	9438
1974	10650
1975	10380
1976	10780
1977	11160
1978	11690
1979	12570
1980	13090
1981	12760
1982	12030
1983	11980
1984	12280
1985	12300
1986	12810
1987	13020
1988	13360
1989	13720
1990	13180
1991	12560
1992	11590
1993	11620
1994	12030
1995	12290
1996	12620
1997	13130
1998	13890
1999	13900
2000	14150
2001	13730
2002	13740
2003	13960
2004	14420
2005	14960
2006	15780
2007	16000
2008	16020
2009	15330
2010	15330
2011	15370
2012	15340
2013	15190
2014	14970
2015	15070
2016	15270
2017	15510
2018	15830
2019	16160