Year	Measure
1800	992.4
1801	993.4
1802	994.4
1803	995.5
1804	996.5
1805	997.5
1806	998.6
1807	999.6
1808	1001
1809	1002
1810	1003
1811	1004
1812	1005
1813	1006
1814	1007
1815	1008
1816	1009
1817	1010
1818	1011
1819	1012
1820	1013
1821	1020
1822	1026
1823	1033
1824	1039
1825	1046
1826	1052
1827	1059
1828	1066
1829	1072
1830	1079
1831	1086
1832	1093
1833	1100
1834	1107
1835	1114
1836	1121
1837	1128
1838	1135
1839	1142
1840	1150
1841	1157
1842	1164
1843	1172
1844	1179
1845	1186
1846	1194
1847	1202
1848	1209
1849	1217
1850	1225
1851	1232
1852	1240
1853	1248
1854	1256
1855	1264
1856	1272
1857	1280
1858	1288
1859	1296
1860	1304
1861	1313
1862	1321
1863	1329
1864	1338
1865	1346
1866	1355
1867	1363
1868	1372
1869	1381
1870	1389
1871	1398
1872	1407
1873	1416
1874	1425
1875	1434
1876	1443
1877	1452
1878	1461
1879	1471
1880	1480
1881	1489
1882	1499
1883	1508
1884	1518
1885	1527
1886	1468
1887	1717
1888	1652
1889	1536
1890	1529
1891	1401
1892	1534
1893	1738
1894	1976
1895	1829
1896	2014
1897	1980
1898	2033
1899	2157
1900	2111
1901	2163
1902	2351
1903	2189
1904	2420
1905	2142
1906	2048
1907	1968
1908	2149
1909	2231
1910	2380
1911	2199
1912	2376
1913	2496
1914	2384
1915	2453
1916	2181
1917	1915
1918	1172
1919	1011
1920	1015
1921	929
1922	1078
1923	1242
1924	1573
1925	1966
1926	2208
1927	2300
1928	2419
1929	2447
1930	2557
1931	2580
1932	2540
1933	2636
1934	2878
1935	3291
1936	3514
1937	3806
1938	3795
1939	3949
1940	3785
1941	3714
1942	3644
1943	3575
1944	3508
1945	3443
1946	3378
1947	3753
1948	4240
1949	4631
1950	5016
1951	4954
1952	5185
1953	5319
1954	5484
1955	5849
1956	6296
1957	6313
1958	6668
1959	6478
1960	6965
1961	7235
1962	7309
1963	7036
1964	7837
1965	8181
1966	8481
1967	8762
1968	9184
1969	9225
1970	9842
1971	10010
1972	9962
1973	10700
1974	10640
1975	10310
1976	10440
1977	10340
1978	10250
1979	9871
1980	9565
1981	9343
1982	9264
1983	9250
1984	9056
1985	8837
1986	8900
1987	8722
1988	8623
1989	8497
1990	8039
1991	7471
1992	6206
1993	6162
1994	4988
1995	4535
1996	4744
1997	4122
1998	4330
1999	4949
2000	5153
2001	5265
2002	5262
2003	5518
2004	6215
2005	6652
2006	7266
2007	7942
2008	8970
2009	9370
2010	10070
2011	11360
2012	12420
2013	13470
2014	14670
2015	16240
2016	17520
2017	18590
2018	19720
2019	21020