Year	Measure
1800	698.2
1801	699.8
1802	701.4
1803	703
1804	704.6
1805	706.2
1806	707.8
1807	709.4
1808	711
1809	712.6
1810	714.2
1811	715.8
1812	717.5
1813	719.1
1814	720.7
1815	722.4
1816	724
1817	725.7
1818	727.3
1819	729
1820	730.6
1821	732.3
1822	733.9
1823	735.6
1824	737.3
1825	738.9
1826	740.6
1827	742.3
1828	744
1829	745.7
1830	747.4
1831	749.1
1832	750.8
1833	752.5
1834	754.2
1835	755.9
1836	757.6
1837	759.3
1838	761
1839	762.8
1840	764.5
1841	766.2
1842	768
1843	769.7
1844	771.5
1845	773.2
1846	775
1847	776.7
1848	778.5
1849	780.3
1850	782
1851	783.8
1852	785.6
1853	787.4
1854	789.2
1855	790.9
1856	792.7
1857	794.5
1858	796.3
1859	798.2
1860	800
1861	801.8
1862	803.6
1863	805.4
1864	807.3
1865	809.1
1866	810.9
1867	812.8
1868	814.6
1869	816.5
1870	818.3
1871	820.2
1872	822
1873	823.9
1874	825.8
1875	827.6
1876	829.5
1877	831.4
1878	833.3
1879	835.2
1880	837.1
1881	839
1882	840.9
1883	842.8
1884	844.7
1885	846.6
1886	848.5
1887	850.5
1888	852.4
1889	854.3
1890	856.3
1891	858.2
1892	860.2
1893	862.1
1894	864.1
1895	866
1896	868
1897	870
1898	872
1899	873.9
1900	875.9
1901	877.9
1902	879.9
1903	881.9
1904	883.9
1905	885.9
1906	887.9
1907	889.9
1908	891.9
1909	894
1910	896
1911	898
1912	900.1
1913	902.1
1914	931.7
1915	962.2
1916	993.8
1917	1026
1918	1060
1919	1095
1920	1131
1921	1168
1922	1206
1923	1245
1924	1286
1925	1328
1926	1372
1927	1417
1928	1463
1929	1511
1930	1561
1931	1612
1932	1665
1933	1719
1934	1776
1935	1834
1936	1894
1937	1956
1938	2020
1939	2087
1940	2155
1941	2226
1942	2299
1943	2374
1944	2452
1945	2532
1946	2615
1947	2701
1948	2789
1949	2881
1950	2975
1951	3095
1952	3218
1953	3345
1954	3475
1955	3312
1956	3601
1957	3792
1958	3407
1959	3713
1960	3708
1961	3650
1962	3575
1963	3587
1964	3835
1965	4199
1966	4660
1967	5297
1968	5357
1969	4729
1970	4744
1971	4687
1972	4979
1973	4736
1974	4734
1975	4548
1976	4521
1977	4237
1978	4064
1979	3778
1980	3800
1981	3647
1982	3618
1983	3605
1984	3471
1985	3363
1986	3347
1987	3336
1988	3302
1989	3239
1990	3175
1991	3033
1992	2907
1993	3029
1994	2700
1995	2566
1996	2663
1997	2676
1998	2554
1999	2542
2000	2566
2001	2628
2002	2653
2003	2705
2004	2807
2005	2884
2006	2988
2007	3096
2008	3196
2009	3300
2010	3436
2011	3557
2012	3696
2013	3794
2014	3941
2015	4085
2016	4222
2017	4358
2018	4484
2019	4600