Year	Measure
1800	986.9
1801	987.9
1802	989
1803	990
1804	991
1805	992.1
1806	993.1
1807	994.1
1808	995.2
1809	996.2
1810	997.2
1811	998.3
1812	999.3
1813	1000
1814	1001
1815	1002
1816	1003
1817	1005
1818	1006
1819	1007
1820	1008
1821	1014
1822	1020
1823	1027
1824	1033
1825	1040
1826	1047
1827	1053
1828	1060
1829	1067
1830	1073
1831	1080
1832	1087
1833	1094
1834	1101
1835	1108
1836	1115
1837	1122
1838	1129
1839	1136
1840	1143
1841	1151
1842	1158
1843	1165
1844	1173
1845	1180
1846	1187
1847	1195
1848	1202
1849	1210
1850	1218
1851	1225
1852	1233
1853	1241
1854	1249
1855	1257
1856	1265
1857	1273
1858	1281
1859	1289
1860	1297
1861	1305
1862	1314
1863	1322
1864	1330
1865	1339
1866	1347
1867	1356
1868	1364
1869	1373
1870	1382
1871	1390
1872	1399
1873	1408
1874	1417
1875	1426
1876	1435
1877	1444
1878	1453
1879	1462
1880	1472
1881	1481
1882	1490
1883	1500
1884	1509
1885	1519
1886	1460
1887	1707
1888	1642
1889	1527
1890	1521
1891	1393
1892	1525
1893	1728
1894	1965
1895	1818
1896	2003
1897	1969
1898	2022
1899	2145
1900	2099
1901	2152
1902	2338
1903	2177
1904	2407
1905	2131
1906	2036
1907	1957
1908	2137
1909	2219
1910	2367
1911	2187
1912	2363
1913	2483
1914	2371
1915	2440
1916	2169
1917	1905
1918	1524
1919	1402
1920	1822
1921	2096
1922	2410
1923	2579
1924	2623
1925	2745
1926	2820
1927	3015
1928	3192
1929	3204
1930	3143
1931	3043
1932	3007
1933	3186
1934	3524
1935	3647
1936	3866
1937	4058
1938	4233
1939	4018
1940	3797
1941	3726
1942	3656
1943	3588
1944	3520
1945	3454
1946	3389
1947	3766
1948	4255
1949	4647
1950	5034
1951	4971
1952	5202
1953	5337
1954	5503
1955	5869
1956	6318
1957	6335
1958	6691
1959	6500
1960	6989
1961	7259
1962	7334
1963	7060
1964	7864
1965	8209
1966	8510
1967	8792
1968	9215
1969	9257
1970	9876
1971	10040
1972	9996
1973	10730
1974	11000
1975	10990
1976	11460
1977	11690
1978	11940
1979	11850
1980	11830
1981	11910
1982	12170
1983	12520
1984	12630
1985	12700
1986	13180
1987	13310
1988	13550
1989	13760
1990	13420
1991	12150
1992	10650
1993	9986
1994	9986
1995	10590
1996	11210
1997	12510
1998	13280
1999	13370
2000	14520
2001	15560
2002	16800
2003	17780
2004	19390
2005	21500
2006	23720
2007	25550
2008	24510
2009	21070
2010	21780
2011	23580
2012	25370
2013	25740
2014	25430
2015	26260
2016	27190
2017	28180
2018	29230
2019	30330