Year	Measure
1820	659
1821	662.1
1822	665.2
1823	668.3
1824	671.5
1825	674.6
1826	677.8
1827	681
1828	684.2
1829	687.4
1830	690.6
1831	693.8
1832	697.1
1833	700.3
1834	703.6
1835	706.9
1836	710.2
1837	713.6
1838	716.9
1839	720.3
1840	723.7
1841	727
1842	730.5
1843	733.9
1844	737.3
1845	740.8
1846	744.3
1847	747.7
1848	751.3
1849	754.8
1850	758.3
1851	761.9
1852	765.4
1853	769
1854	772.6
1855	776.3
1856	779.9
1857	783.6
1858	787.2
1859	790.9
1860	794.6
1861	798.4
1862	802.1
1863	805.9
1864	809.6
1865	813.4
1866	817.3
1867	821.1
1868	824.9
1869	828.8
1870	832.7
1871	836.6
1872	840.5
1873	844.5
1874	848.4
1875	852.4
1876	856.4
1877	860.4
1878	864.4
1879	868.5
1880	872.6
1881	876.7
1882	880.8
1883	884.9
1884	889.1
1885	893.2
1886	897.4
1887	901.6
1888	905.8
1889	910.1
1890	914.4
1891	918.6
1892	923
1893	927.3
1894	931.6
1895	936
1896	940.4
1897	944.8
1898	949.2
1899	953.7
1900	958.2
1901	962.6
1902	967.2
1903	971.7
1904	976.2
1905	980.8
1906	985.4
1907	990
1908	994.7
1909	999.4
1910	1004
1911	1009
1912	1013
1913	1018
1914	1027
1915	1037
1916	1046
1917	1056
1918	1065
1919	1075
1920	1085
1921	1095
1922	1105
1923	1115
1924	1125
1925	1135
1926	1146
1927	1156
1928	1166
1929	1177
1930	1188
1931	1199
1932	1210
1933	1221
1934	1232
1935	1243
1936	1254
1937	1266
1938	1277
1939	1289
1940	1300
1941	1312
1942	1324
1943	1336
1944	1348
1945	1361
1946	1373
1947	1386
1948	1398
1949	1411
1950	1424
1951	1459
1952	1493
1953	1528
1954	1563
1955	1600
1956	1636
1957	1672
1958	1709
1959	1745
1960	1766
1961	1758
1962	1782
1963	1818
1964	1850
1965	1854
1966	1905
1967	1921
1968	2007
1969	2064
1970	2084
1971	2101
1972	2145
1973	2129
1974	2173
1975	2232
1976	2215
1977	2271
1978	2323
1979	2379
1980	2533
1981	2874
1982	3016
1983	3135
1984	3280
1985	3463
1986	3597
1987	3315
1988	3071
1989	2715
1990	2593
1991	2424
1992	2284
1993	2151
1994	2042
1995	2055
1996	2104
1997	2158
1998	2211
1999	2255
2000	2297
2001	2365
2002	2463
2003	2506
2004	2543
2005	2541
2006	2551
2007	2552
2008	2573
2009	2549
2010	2570
2011	2610
2012	2663
2013	2719
2014	2779
2015	2848
2016	2924
2017	3004
2018	3089
2019	3175