Year	Measure
1800	855.7
1801	856
1802	856.4
1803	856.8
1804	857.2
1805	857.6
1806	858
1807	858.4
1808	858.8
1809	859.2
1810	859.6
1811	860
1812	860.4
1813	860.8
1814	861.2
1815	861.6
1816	862
1817	862.4
1818	862.8
1819	863.2
1820	863.6
1821	864
1822	864.4
1823	864.8
1824	865.1
1825	865.5
1826	865.9
1827	866.3
1828	866.7
1829	867.1
1830	867.5
1831	867.9
1832	868.3
1833	868.7
1834	869.1
1835	869.5
1836	869.9
1837	870.3
1838	870.7
1839	871.1
1840	871.5
1841	871.9
1842	872.3
1843	872.7
1844	873.1
1845	873.5
1846	873.9
1847	874.3
1848	874.7
1849	875.2
1850	875.6
1851	876
1852	876.4
1853	876.8
1854	877.2
1855	877.6
1856	878
1857	878.4
1858	878.8
1859	879.2
1860	879.6
1861	880
1862	880.4
1863	880.8
1864	881.2
1865	881.6
1866	882
1867	882.4
1868	882.8
1869	883.2
1870	883.6
1871	884
1872	884.5
1873	884.9
1874	885.3
1875	885.7
1876	886.1
1877	886.5
1878	886.9
1879	887.3
1880	887.7
1881	888.1
1882	888.5
1883	888.9
1884	889.4
1885	889.8
1886	890.2
1887	890.6
1888	891
1889	891.4
1890	891.8
1891	892.2
1892	892.6
1893	893
1894	893.4
1895	893.9
1896	894.3
1897	894.7
1898	895.1
1899	895.5
1900	895.9
1901	897.4
1902	899
1903	900.5
1904	902
1905	903.5
1906	905.1
1907	906.6
1908	908.1
1909	909.7
1910	911.2
1911	912.7
1912	914.3
1913	915.8
1914	917.4
1915	918.9
1916	920.5
1917	922
1918	923.6
1919	925.2
1920	926.7
1921	928.3
1922	929.9
1923	931.4
1924	933
1925	934.6
1926	936.2
1927	937.8
1928	939.3
1929	940.9
1930	942.5
1931	944.1
1932	945.7
1933	947.3
1934	948.9
1935	950.5
1936	952.1
1937	953.7
1938	955.3
1939	957
1940	958.6
1941	960.2
1942	961.8
1943	963.5
1944	965.1
1945	966.7
1946	968.4
1947	970
1948	971.6
1949	973.3
1950	974.9
1951	1007
1952	1014
1953	1028
1954	1059
1955	1066
1956	1077
1957	1089
1958	1089
1959	1119
1960	1158
1961	1309
1962	1253
1963	1223
1964	1264
1965	1358
1966	1533
1967	1536
1968	1508
1969	1617
1970	1411
1971	1523
1972	1580
1973	1600
1974	1856
1975	1685
1976	1820
1977	1849
1978	1698
1979	1911
1980	1667
1981	1601
1982	1747
1983	1487
1984	1398
1985	1237
1986	1257
1987	1279
1988	1363
1989	1404
1990	1409
1991	1385
1992	1391
1993	1420
1994	1419
1995	1319
1996	1350
1997	1366
1998	1366
1999	1406
2000	1436
2001	1471
2002	1381
2003	1429
2004	1486
2005	1518
2006	1491
2007	1503
2008	1545
2009	1600
2010	1659
2011	1545
2012	1583
2013	1638
2014	1711
2015	1782
2016	1830
2017	1879
2018	1929
2019	1981