Year	Measure
1800	414
1801	414
1802	414
1803	414
1804	414
1805	414
1806	414
1807	414
1808	414
1809	414
1810	414
1811	414
1812	414
1813	414
1814	414
1815	414
1816	414
1817	414
1818	414
1819	414
1820	414
1821	418.4
1822	422.8
1823	427.3
1824	431.8
1825	436.3
1826	440.9
1827	445.6
1828	450.3
1829	455.1
1830	459.9
1831	464.7
1832	469.6
1833	474.6
1834	479.6
1835	484.7
1836	489.8
1837	495
1838	500.2
1839	505.5
1840	510.8
1841	516.2
1842	521.7
1843	527.2
1844	532.7
1845	538.4
1846	544.1
1847	549.8
1848	555.6
1849	561.5
1850	567.4
1851	573.4
1852	579.5
1853	585.6
1854	591.8
1855	598
1856	604.3
1857	610.7
1858	617.2
1859	623.7
1860	630.3
1861	636.9
1862	643.7
1863	650.5
1864	657.3
1865	664.3
1866	671.3
1867	678.4
1868	685.6
1869	692.8
1870	700.1
1871	707.5
1872	715
1873	722.5
1874	730.2
1875	737.9
1876	745.7
1877	753.5
1878	761.5
1879	769.6
1880	777.7
1881	785.9
1882	794.2
1883	802.6
1884	811.1
1885	819.6
1886	828.3
1887	837
1888	845.9
1889	854.8
1890	863.8
1891	873
1892	882.2
1893	891.5
1894	900.9
1895	910.4
1896	920.1
1897	929.8
1898	939.6
1899	949.5
1900	959.6
1901	969.7
1902	979.9
1903	990.3
1904	1001
1905	1011
1906	1022
1907	1033
1908	1044
1909	1055
1910	1066
1911	1077
1912	1089
1913	1100
1914	1134
1915	1169
1916	1205
1917	1243
1918	1281
1919	1321
1920	1362
1921	1404
1922	1447
1923	1492
1924	1538
1925	1586
1926	1635
1927	1686
1928	1738
1929	1792
1930	1847
1931	1905
1932	1964
1933	2024
1934	2087
1935	2152
1936	2218
1937	2287
1938	2358
1939	2431
1940	2506
1941	2584
1942	2664
1943	2746
1944	2831
1945	2919
1946	3010
1947	3103
1948	3199
1949	3298
1950	3400
1951	3589
1952	3789
1953	3999
1954	4222
1955	4456
1956	4704
1957	4966
1958	5242
1959	5533
1960	5841
1961	6166
1962	6509
1963	6871
1964	7253
1965	7656
1966	8082
1967	8531
1968	9005
1969	9506
1970	10030
1971	11080
1972	11550
1973	12160
1974	12730
1975	12720
1976	13420
1977	14590
1978	15460
1979	16190
1980	17510
1981	17480
1982	16520
1983	16870
1984	15790
1985	16160
1986	17110
1987	17870
1988	18690
1989	19790
1990	17370
1991	17290
1992	16390
1993	15570
1994	16500
1995	17120
1996	17370
1997	17610
1998	18960
1999	19180
2000	20500
2001	20700
2002	20430
2003	20280
2004	21090
2005	21850
2006	23030
2007	23860
2008	24410
2009	23790
2010	24970
2011	25730
2012	26210
2013	26690