Year	Measure
1800	567.4
1801	567.7
1802	567.9
1803	568.2
1804	568.5
1805	568.7
1806	569
1807	569.2
1808	569.5
1809	569.8
1810	570
1811	570.3
1812	570.6
1813	570.8
1814	571.1
1815	571.3
1816	571.6
1817	571.9
1818	572.1
1819	572.4
1820	572.7
1821	572.9
1822	573.2
1823	573.5
1824	573.7
1825	574
1826	574.3
1827	574.5
1828	574.8
1829	575.1
1830	575.3
1831	575.6
1832	575.9
1833	576.1
1834	576.4
1835	576.6
1836	576.9
1837	577.2
1838	577.4
1839	577.7
1840	578
1841	578.2
1842	578.5
1843	578.8
1844	579.1
1845	579.3
1846	579.6
1847	579.9
1848	580.1
1849	580.4
1850	580.7
1851	580.9
1852	581.2
1853	581.5
1854	581.7
1855	582
1856	582.3
1857	582.5
1858	582.8
1859	583.1
1860	583.3
1861	583.6
1862	583.9
1863	584.2
1864	584.4
1865	584.7
1866	585
1867	585.2
1868	585.5
1869	585.8
1870	586
1871	586.3
1872	586.6
1873	586.9
1874	587.1
1875	587.4
1876	587.7
1877	587.9
1878	588.2
1879	588.5
1880	588.8
1881	589
1882	589.3
1883	589.6
1884	589.8
1885	590.1
1886	590.4
1887	590.7
1888	590.9
1889	591.2
1890	591.5
1891	591.8
1892	592
1893	592.3
1894	592.6
1895	592.9
1896	593.1
1897	593.4
1898	593.7
1899	593.9
1900	594.2
1901	594.5
1902	594.8
1903	595
1904	595.3
1905	595.6
1906	595.9
1907	596.1
1908	596.4
1909	596.7
1910	597
1911	597.2
1912	597.5
1913	597.8
1914	611.6
1915	625.7
1916	640.1
1917	654.9
1918	670
1919	685.5
1920	701.3
1921	717.5
1922	734
1923	751
1924	768.3
1925	786
1926	804.1
1927	822.7
1928	841.7
1929	861.1
1930	881
1931	901.3
1932	922.1
1933	943.4
1934	965.1
1935	987.4
1936	1010
1937	1033
1938	1057
1939	1082
1940	1107
1941	1132
1942	1158
1943	1185
1944	1212
1945	1240
1946	1269
1947	1298
1948	1328
1949	1359
1950	1390
1951	1422
1952	1455
1953	1489
1954	1523
1955	1558
1956	1594
1957	1631
1958	1669
1959	1707
1960	1746
1961	1787
1962	1828
1963	1870
1964	1913
1965	1957
1966	2003
1967	2049
1968	2096
1969	2144
1970	2194
1971	2244
1972	2296
1973	2349
1974	2588
1975	2484
1976	2402
1977	2378
1978	2430
1979	2396
1980	2139
1981	2183
1982	2152
1983	2391
1984	2344
1985	2178
1986	2542
1987	2744
1988	2873
1989	2786
1990	2960
1991	2891
1992	3041
1993	3180
1994	3332
1995	3574
1996	3183
1997	2960
1998	2864
1999	2787
2000	2946
2001	3103
2002	3185
2003	3193
2004	3194
2005	3279
2006	3339
2007	3436
2008	3364
2009	3307
2010	3487
2011	3510
2012	3609
2013	3582
2014	3638
2015	3641
2016	3636
2017	3628
2018	3605
2019	3602