Year	Measure
1800	698.2
1801	698.2
1802	698.2
1803	698.2
1804	698.2
1805	698.2
1806	698.2
1807	698.2
1808	698.2
1809	698.2
1810	698.2
1811	698.2
1812	698.2
1813	698.2
1814	698.2
1815	698.2
1816	698.2
1817	698.2
1818	698.2
1819	698.2
1820	698.2
1821	698.3
1822	698.4
1823	698.5
1824	698.6
1825	698.6
1826	698.7
1827	698.8
1828	698.9
1829	699
1830	699.1
1831	699.2
1832	699.3
1833	699.4
1834	699.5
1835	699.6
1836	699.7
1837	699.8
1838	699.9
1839	700
1840	700
1841	700.1
1842	700.2
1843	700.3
1844	700.4
1845	700.5
1846	700.6
1847	700.7
1848	700.8
1849	700.9
1850	701
1851	701.1
1852	701.2
1853	701.3
1854	701.4
1855	701.5
1856	701.5
1857	701.6
1858	701.7
1859	701.8
1860	701.9
1861	702
1862	702.1
1863	702.2
1864	702.3
1865	702.4
1866	702.5
1867	702.6
1868	702.7
1869	702.8
1870	702.9
1871	705.5
1872	708.2
1873	710.9
1874	713.6
1875	716.4
1876	719.1
1877	721.8
1878	724.6
1879	727.4
1880	730.1
1881	732.9
1882	735.7
1883	738.5
1884	741.4
1885	744.2
1886	747
1887	749.9
1888	752.7
1889	755.6
1890	758.5
1891	761.4
1892	764.3
1893	767.2
1894	770.1
1895	773.1
1896	776
1897	779
1898	782
1899	784.9
1900	787.9
1901	790.9
1902	794
1903	797
1904	800
1905	803.1
1906	806.1
1907	809.2
1908	812.3
1909	815.4
1910	818.5
1911	821.6
1912	847.1
1913	870.3
1914	899.8
1915	1042
1916	1008
1917	1104
1918	1177
1919	1240
1920	1067
1921	1137
1922	1033
1923	1093
1924	1087
1925	1074
1926	1102
1927	1136
1928	1130
1929	1058
1930	989.5
1931	983.2
1932	973.3
1933	1164
1934	1149
1935	1239
1936	1340
1937	1466
1938	1529
1939	1368
1940	1531
1941	1539
1942	1517
1943	1527
1944	1448
1945	674.4
1946	682.2
1947	719
1948	773.1
1949	829.5
1950	870.5
1951	727.4
1952	777.4
1953	1004
1954	1059
1955	1109
1956	1097
1957	1158
1958	1193
1959	1209
1960	1200
1961	1229
1962	1234
1963	1313
1964	1396
1965	1452
1966	1597
1967	1684
1968	1866
1969	2115
1970	2262
1971	2938
1972	3002
1973	3332
1974	3373
1975	3373
1976	3373
1977	3373
1978	3373
1979	3373
1980	3373
1981	3373
1982	3373
1983	3373
1984	3373
1985	3373
1986	3373
1987	3373
1988	3373
1989	3373
1990	3373
1991	3373
1992	3061
1993	3018
1994	2300
1995	2000
1996	1809
1997	1691
1998	1693
1999	1706
2000	1690
2001	1667
2002	1647
2003	1628
2004	1612
2005	1597
2006	1571
2007	1544
2008	1585
2009	1563
2010	1549
2011	1540
2012	1540