Year	Measure
1800	703.7
1801	703.7
1802	703.7
1803	703.7
1804	703.7
1805	703.7
1806	703.7
1807	703.7
1808	703.7
1809	703.7
1810	703.7
1811	703.7
1812	703.7
1813	703.7
1814	703.7
1815	703.7
1816	703.7
1817	703.7
1818	703.7
1819	703.7
1820	703.7
1821	707.2
1822	710.7
1823	714.2
1824	717.7
1825	721.3
1826	724.9
1827	728.5
1828	732.1
1829	735.7
1830	739.4
1831	743
1832	746.7
1833	750.4
1834	754.1
1835	757.9
1836	761.6
1837	765.4
1838	769.2
1839	773
1840	776.9
1841	780.7
1842	784.6
1843	788.5
1844	792.4
1845	796.3
1846	800.3
1847	804.2
1848	808.2
1849	812.2
1850	816.3
1851	816.6
1852	816.9
1853	817.3
1854	817.6
1855	818
1856	818.3
1857	818.7
1858	819
1859	819.3
1860	819.7
1861	820
1862	820.4
1863	820.7
1864	821.1
1865	821.4
1866	821.8
1867	822.1
1868	822.4
1869	822.8
1870	823.1
1871	834.3
1872	845.7
1873	857.2
1874	868.9
1875	880.7
1876	892.7
1877	904.9
1878	917.2
1879	929.7
1880	942.3
1881	955.1
1882	968.1
1883	981.3
1884	994.7
1885	1008
1886	1022
1887	1036
1888	1050
1889	1064
1890	1079
1891	1082
1892	1085
1893	1088
1894	1092
1895	1095
1896	1098
1897	1102
1898	1105
1899	1108
1900	1112
1901	1125
1902	1138
1903	1152
1904	1166
1905	1180
1906	1194
1907	1208
1908	1223
1909	1238
1910	1252
1911	1247
1912	1242
1913	1238
1914	1228
1915	1219
1916	1210
1917	1200
1918	1191
1919	1182
1920	1173
1921	1180
1922	1192
1923	1231
1924	1296
1925	1335
1926	1402
1927	1353
1928	1446
1929	1494
1930	1438
1931	1369
1932	1219
1933	1234
1934	1257
1935	1216
1936	1349
1937	1346
1938	1428
1939	1479
1940	1460
1941	1440
1942	1421
1943	1402
1944	1383
1945	1365
1946	1347
1947	1329
1948	1557
1949	1679
1950	1545
1951	1577
1952	1429
1953	1613
1954	1672
1955	1747
1956	1685
1957	1939
1958	1993
1959	2206
1960	2312
1961	2380
1962	2389
1963	2599
1964	2807
1965	2840
1966	2949
1967	2959
1968	2980
1969	3271
1970	3384
1971	3721
1972	3795
1973	3868
1974	4305
1975	4245
1976	4311
1977	4558
1978	4741
1979	4997
1980	5178
1981	5210
1982	5185
1983	5171
1984	5243
1985	5228
1986	5384
1987	5269
1988	5142
1989	5025
1990	4614
1991	4055
1992	3057
1993	2275
1994	2442
1995	2641
1996	4186
1997	5720
1998	6302
1999	6655
2000	6881
2001	7058
2002	7224
2003	7318
2004	7582
2005	7808
2006	8273
2007	8786
2008	9289
2009	9035
2010	9117
2011	9248
2012	9151
2013	9276
2014	9477
2015	9800
2016	10190
2017	10620
2018	11070
2019	11540