Year	Measure
1800	580
1801	580.4
1802	580.8
1803	581.3
1804	581.7
1805	582.1
1806	582.6
1807	583
1808	583.4
1809	583.8
1810	584.3
1811	584.7
1812	585.1
1813	585.5
1814	586
1815	586.4
1816	586.8
1817	587.3
1818	587.7
1819	588.1
1820	588.6
1821	589
1822	589.4
1823	589.8
1824	590.3
1825	590.7
1826	591.1
1827	591.6
1828	592
1829	592.4
1830	592.9
1831	593.3
1832	593.7
1833	594.2
1834	594.6
1835	595
1836	595.5
1837	595.9
1838	596.4
1839	596.8
1840	597.2
1841	597.7
1842	598.1
1843	598.5
1844	599
1845	599.4
1846	599.9
1847	600.3
1848	600.7
1849	601.2
1850	601.6
1851	602.1
1852	602.5
1853	602.9
1854	603.4
1855	603.8
1856	604.3
1857	604.7
1858	605.1
1859	605.6
1860	606
1861	606.5
1862	606.9
1863	607.4
1864	607.8
1865	608.3
1866	608.7
1867	609.1
1868	609.6
1869	610
1870	610.5
1871	610.9
1872	611.4
1873	611.8
1874	612.3
1875	612.7
1876	613.2
1877	613.6
1878	614.1
1879	614.5
1880	615
1881	615.4
1882	615.9
1883	616.3
1884	616.8
1885	617.2
1886	617.7
1887	618.1
1888	618.6
1889	619
1890	619.5
1891	619.9
1892	620.4
1893	620.8
1894	621.3
1895	621.8
1896	622.2
1897	622.7
1898	623.1
1899	623.6
1900	624
1901	624.5
1902	624.9
1903	625.4
1904	625.9
1905	626.3
1906	626.8
1907	627.2
1908	627.7
1909	628.2
1910	628.6
1911	629.1
1912	629.5
1913	630
1914	648.1
1915	666.7
1916	685.8
1917	705.5
1918	725.7
1919	746.5
1920	767.9
1921	790
1922	812.6
1923	836
1924	859.9
1925	884.6
1926	910
1927	936.1
1928	963
1929	990.6
1930	1019
1931	1048
1932	1078
1933	1109
1934	1141
1935	1174
1936	1207
1937	1242
1938	1278
1939	1314
1940	1352
1941	1391
1942	1431
1943	1472
1944	1514
1945	1558
1946	1602
1947	1648
1948	1695
1949	1744
1950	1794
1951	1846
1952	1899
1953	1953
1954	2009
1955	2067
1956	2126
1957	2187
1958	2250
1959	2314
1960	2381
1961	2449
1962	2519
1963	2592
1964	2666
1965	2742
1966	2821
1967	2902
1968	2985
1969	3071
1970	3159
1971	3019
1972	3317
1973	3938
1974	5614
1975	5796
1976	4152
1977	3868
1978	3814
1979	3288
1980	1780
1981	1674
1982	1797
1983	1578
1984	1654
1985	1534
1986	1512
1987	1422
1988	1634
1989	1455
1990	1453
1991	1365
1992	1388
1993	1418
1994	1468
1995	1434
1996	1500
1997	1559
1998	1702
1999	1676
2000	1804
2001	1785
2002	1763
2003	1801
2004	1826
2005	1792
2006	1683
2007	1782
2008	1803
2009	1765
2010	1729
2011	1750
2012	1764
2013	1779
2014	1791
2015	1791
2016	1790
2017	1789
2018	1789
2019	1788