Year	Measure
1800	907.7
1801	907.7
1802	907.7
1803	907.7
1804	907.7
1805	907.7
1806	907.7
1807	907.7
1808	907.7
1809	907.7
1810	907.7
1811	907.7
1812	907.7
1813	907.7
1814	907.7
1815	907.7
1816	907.7
1817	907.7
1818	907.7
1819	907.7
1820	907.7
1821	909.6
1822	911.5
1823	913.4
1824	915.3
1825	917.2
1826	919.2
1827	921.1
1828	923
1829	925
1830	926.9
1831	928.9
1832	930.8
1833	932.8
1834	934.7
1835	936.7
1836	938.6
1837	940.6
1838	942.6
1839	944.6
1840	946.5
1841	948.5
1842	950.5
1843	952.5
1844	954.5
1845	956.5
1846	958.5
1847	960.5
1848	962.5
1849	964.6
1850	966.6
1851	968.6
1852	970.6
1853	972.7
1854	974.7
1855	976.8
1856	978.8
1857	980.9
1858	982.9
1859	985
1860	987
1861	989.1
1862	991.2
1863	993.3
1864	995.4
1865	997.4
1866	999.5
1867	1002
1868	1004
1869	1006
1870	1008
1871	1023
1872	1038
1873	1053
1874	1069
1875	1084
1876	1100
1877	1116
1878	1133
1879	1149
1880	1166
1881	1183
1882	1201
1883	1219
1884	1236
1885	1255
1886	1273
1887	1292
1888	1311
1889	1330
1890	1350
1891	1369
1892	1390
1893	1410
1894	1431
1895	1452
1896	1473
1897	1495
1898	1517
1899	1539
1900	1562
1901	1585
1902	1608
1903	1632
1904	1656
1905	1680
1906	1705
1907	1730
1908	1755
1909	1781
1910	1807
1911	1834
1912	1861
1913	1888
1914	1916
1915	1945
1916	1974
1917	2004
1918	2034
1919	2064
1920	2095
1921	2127
1922	2159
1923	2191
1924	2224
1925	2257
1926	2291
1927	2325
1928	2360
1929	2395
1930	2431
1931	2468
1932	2505
1933	2542
1934	2580
1935	2619
1936	2658
1937	2698
1938	2739
1939	2780
1940	2821
1941	2864
1942	2907
1943	2950
1944	2994
1945	3039
1946	3085
1947	3131
1948	3178
1949	3225
1950	3274
1951	3388
1952	3509
1953	3630
1954	3758
1955	3890
1956	4028
1957	4169
1958	4315
1959	4467
1960	4625
1961	4787
1962	5391
1963	6026
1964	6387
1965	7121
1966	7180
1967	7120
1968	7202
1969	7889
1970	8406
1971	8809
1972	9553
1973	10490
1974	10470
1975	10320
1976	11670
1977	12850
1978	13690
1979	14460
1980	15500
1981	16530
1982	16730
1983	17410
1984	18960
1985	18840
1986	20600
1987	23020
1988	24670
1989	25150
1990	25890
1991	27040
1992	28440
1993	29710
1994	30650
1995	31040
1996	31530
1997	32600
1998	30750
1999	31540
2000	34430
2001	34310
2002	34700
2003	35570
2004	38370
2005	40990
2006	43450
2007	46030
2008	46840
2009	45470
2010	48180
2011	50090
2012	50400
2013	51410
2014	52850
2015	54380
2016	56000
2017	57670
2018	59410
2019	61230