Year	Measure
1800	650
1801	652.8
1802	655.5
1803	658.3
1804	661.1
1805	663.9
1806	666.8
1807	669.6
1808	672.4
1809	675.3
1810	678.2
1811	681.1
1812	684
1813	686.9
1814	689.8
1815	692.7
1816	695.7
1817	698.6
1818	701.6
1819	704.6
1820	707.6
1821	710.6
1822	713.6
1823	716.6
1824	719.7
1825	722.8
1826	725.8
1827	728.9
1828	732
1829	735.1
1830	738.3
1831	741.4
1832	744.6
1833	747.7
1834	750.9
1835	754.1
1836	757.3
1837	760.5
1838	763.8
1839	767
1840	770.3
1841	773.5
1842	776.8
1843	780.1
1844	783.5
1845	786.8
1846	790.1
1847	793.5
1848	796.9
1849	800.3
1850	803.7
1851	807.1
1852	810.5
1853	814
1854	817.4
1855	820.9
1856	824.4
1857	827.9
1858	831.4
1859	834.9
1860	838.5
1861	842.1
1862	845.6
1863	849.2
1864	852.9
1865	856.5
1866	860.1
1867	863.8
1868	867.5
1869	871.1
1870	874.9
1871	878.6
1872	882.3
1873	886.1
1874	889.8
1875	893.6
1876	897.4
1877	901.2
1878	905.1
1879	908.9
1880	912.8
1881	916.7
1882	920.6
1883	924.5
1884	928.4
1885	932.4
1886	936.3
1887	940.3
1888	944.3
1889	948.3
1890	952.4
1891	956.4
1892	960.5
1893	964.6
1894	968.7
1895	972.8
1896	976.9
1897	981.1
1898	985.2
1899	989.4
1900	993.6
1901	997.9
1902	1002
1903	1006
1904	1011
1905	1015
1906	1019
1907	1024
1908	1028
1909	1032
1910	1037
1911	1041
1912	1046
1913	1050
1914	1081
1915	1113
1916	1146
1917	1180
1918	1215
1919	1251
1920	1288
1921	1326
1922	1365
1923	1405
1924	1447
1925	1490
1926	1534
1927	1579
1928	1626
1929	1674
1930	1724
1931	1775
1932	1827
1933	1881
1934	1937
1935	1994
1936	2053
1937	2114
1938	2176
1939	2241
1940	2307
1941	2375
1942	2446
1943	2518
1944	2593
1945	2669
1946	2748
1947	2830
1948	2913
1949	2999
1950	3088
1951	3160
1952	3233
1953	3305
1954	3169
1955	3372
1956	3259
1957	3515
1958	3642
1959	3598
1960	3679
1961	4099
1962	3920
1963	4053
1964	4432
1965	4685
1966	4874
1967	5072
1968	4910
1969	4966
1970	5190
1971	5391
1972	5285
1973	5585
1974	5625
1975	5211
1976	4813
1977	4723
1978	4351
1979	4238
1980	4218
1981	3897
1982	3760
1983	3780
1984	3872
1985	3884
1986	3897
1987	4065
1988	4188
1989	4098
1990	3969
1991	3888
1992	3545
1993	2607
1994	2559
1995	2855
1996	3330
1997	3420
1998	3330
1999	3343
2000	3341
2001	3335
2002	3691
2003	3682
2004	3956
2005	4613
2006	5304
2007	6342
2008	7013
2009	6980
2010	7022
2011	7094
2012	7245
2013	7319
2014	7483
2015	7667
2016	7880
2017	7900
2018	8174
2019	8464