Year	Measure
1800	750
1801	750
1802	750
1803	750
1804	750
1805	750
1806	750
1807	750
1808	750
1809	750
1810	750
1811	750
1812	750
1813	750
1814	750
1815	750
1816	750
1817	750
1818	750
1819	750
1820	750
1821	754.6
1822	759.2
1823	763.8
1824	768.4
1825	773.1
1826	777.8
1827	782.6
1828	787.3
1829	792.1
1830	797
1831	801.8
1832	806.7
1833	811.6
1834	816.6
1835	821.5
1836	826.5
1837	831.6
1838	836.6
1839	841.7
1840	846.9
1841	852
1842	857.2
1843	862.4
1844	867.7
1845	873
1846	878.3
1847	883.6
1848	889
1849	894.4
1850	899.9
1851	905.4
1852	910.9
1853	916.4
1854	922
1855	927.6
1856	933.3
1857	939
1858	944.7
1859	950.4
1860	956.2
1861	962
1862	967.9
1863	973.8
1864	979.7
1865	985.7
1866	991.7
1867	997.7
1868	1004
1869	1010
1870	1016
1871	1026
1872	1036
1873	1046
1874	1056
1875	1067
1876	1077
1877	1088
1878	1098
1879	1109
1880	1120
1881	1131
1882	1142
1883	1153
1884	1164
1885	1176
1886	1187
1887	1199
1888	1210
1889	1222
1890	1234
1891	1246
1892	1258
1893	1271
1894	1283
1895	1296
1896	1308
1897	1321
1898	1334
1899	1347
1900	1360
1901	1374
1902	1387
1903	1400
1904	1414
1905	1428
1906	1442
1907	1456
1908	1470
1909	1485
1910	1499
1911	1514
1912	1529
1913	1544
1914	1569
1915	1596
1916	1623
1917	1650
1918	1678
1919	1706
1920	1735
1921	1764
1922	1794
1923	1824
1924	1855
1925	1886
1926	1918
1927	1950
1928	1983
1929	2016
1930	2050
1931	2085
1932	2120
1933	2156
1934	2192
1935	2229
1936	2266
1937	2305
1938	2343
1939	2383
1940	2423
1941	2464
1942	2505
1943	2547
1944	2590
1945	2634
1946	2678
1947	2723
1948	2769
1949	2816
1950	2863
1951	2792
1952	2723
1953	2659
1954	2594
1955	2529
1956	2685
1957	2982
1958	3243
1959	3428
1960	3660
1961	3864
1962	3834
1963	4141
1964	4321
1965	4718
1966	5048
1967	5464
1968	6119
1969	6730
1970	7247
1971	7933
1972	8985
1973	9504
1974	10070
1975	10280
1976	11710
1977	11230
1978	9598
1979	8478
1980	7007
1981	6524
1982	7258
1983	7909
1984	7749
1985	7654
1986	6696
1987	6402
1988	5892
1989	5959
1990	6332
1991	6771
1992	7045
1993	7171
1994	7331
1995	7496
1996	7835
1997	8129
1998	8185
1999	8260
2000	8601
2001	8834
2002	9184
2003	9725
2004	10300
2005	10690
2006	11180
2007	11760
2008	11680
2009	11970
2010	12480
2011	12720
2012	12330
2013	12020
2014	11990
2015	12070
2016	12180
2017	12290
2018	12430