Year	Measure
1820	545.5
1821	548.1
1822	550.7
1823	553.2
1824	555.8
1825	558.5
1826	561.1
1827	563.7
1828	566.3
1829	569
1830	571.7
1831	574.3
1832	577
1833	579.7
1834	582.5
1835	585.2
1836	587.9
1837	590.7
1838	593.5
1839	596.2
1840	599
1841	601.9
1842	604.7
1843	607.5
1844	610.4
1845	613.2
1846	616.1
1847	619
1848	621.9
1849	624.8
1850	627.7
1851	630.7
1852	633.6
1853	636.6
1854	639.6
1855	642.6
1856	645.6
1857	648.6
1858	651.7
1859	654.7
1860	657.8
1861	660.9
1862	664
1863	667.1
1864	670.2
1865	673.4
1866	676.5
1867	679.7
1868	682.9
1869	686.1
1870	689.3
1871	692.5
1872	695.8
1873	699
1874	702.3
1875	705.6
1876	708.9
1877	712.2
1878	715.6
1879	718.9
1880	722.3
1881	725.7
1882	729.1
1883	732.5
1884	736
1885	739.4
1886	742.9
1887	746.4
1888	749.9
1889	753.4
1890	756.9
1891	760.5
1892	764
1893	767.6
1894	771.2
1895	774.8
1896	778.5
1897	782.1
1898	785.8
1899	789.5
1900	793.2
1901	796.9
1902	800.6
1903	804.4
1904	808.1
1905	811.9
1906	815.7
1907	819.6
1908	823.4
1909	827.3
1910	831.1
1911	835
1912	839
1913	842.9
1914	859.7
1915	876.7
1916	894.2
1917	912
1918	930.1
1919	948.6
1920	967.5
1921	986.7
1922	1006
1923	1026
1924	1047
1925	1068
1926	1089
1927	1110
1928	1133
1929	1155
1930	1178
1931	1201
1932	1225
1933	1250
1934	1275
1935	1300
1936	1326
1937	1352
1938	1379
1939	1406
1940	1434
1941	1463
1942	1492
1943	1522
1944	1552
1945	1583
1946	1614
1947	1646
1948	1679
1949	1712
1950	1746
1951	1781
1952	1819
1953	1853
1954	1891
1955	1929
1956	2076
1957	1992
1958	2018
1959	2197
1960	2178
1961	2119
1962	2205
1963	2085
1964	2009
1965	2094
1966	2014
1967	1900
1968	1963
1969	2029
1970	1890
1971	1964
1972	1868
1973	1659
1974	1772
1975	1936
1976	2222
1977	2479
1978	2357
1979	2035
1980	1982
1981	1958
1982	2133
1983	2039
1984	1869
1985	1683
1986	1698
1987	1697
1988	1682
1989	1772
1990	1582
1991	1642
1992	1679
1993	1683
1994	1670
1995	1675
1996	1715
1997	1837
1998	1891
1999	1979
2000	2109
2001	2176
2002	2243
2003	2338
2004	2393
2005	2531
2006	2687
2007	2841
2008	2853
2009	2925
2010	2923
2011	3524
2012	3332
2013	3356
2014	3359
2015	3425
2016	3540
2017	3630
2018	3731
2019	3794