Year	Measure
1800	833.2
1801	836.4
1802	839.6
1803	842.8
1804	846
1805	849.2
1806	852.5
1807	855.7
1808	859
1809	862.3
1810	865.6
1811	868.9
1812	872.2
1813	875.5
1814	878.9
1815	882.2
1816	885.6
1817	889
1818	892.4
1819	895.8
1820	899.2
1821	902.7
1822	906.1
1823	909.6
1824	913
1825	916.5
1826	920
1827	923.5
1828	927.1
1829	930.6
1830	934.2
1831	937.7
1832	941.3
1833	944.9
1834	948.5
1835	952.1
1836	955.8
1837	959.4
1838	963.1
1839	966.8
1840	970.5
1841	974.2
1842	977.9
1843	981.6
1844	985.4
1845	989.1
1846	992.9
1847	996.7
1848	1001
1849	1004
1850	1008
1851	1012
1852	1016
1853	1020
1854	1024
1855	1028
1856	1032
1857	1035
1858	1039
1859	1043
1860	1047
1861	1051
1862	1055
1863	1059
1864	1063
1865	1068
1866	1072
1867	1076
1868	1080
1869	1084
1870	1088
1871	1092
1872	1096
1873	1101
1874	1105
1875	1109
1876	1113
1877	1117
1878	1122
1879	1126
1880	1130
1881	1135
1882	1139
1883	1143
1884	1148
1885	1152
1886	1156
1887	1161
1888	1165
1889	1170
1890	1174
1891	1179
1892	1183
1893	1188
1894	1192
1895	1197
1896	1201
1897	1206
1898	1211
1899	1215
1900	1220
1901	1225
1902	1229
1903	1234
1904	1239
1905	1243
1906	1248
1907	1253
1908	1258
1909	1262
1910	1267
1911	1272
1912	1277
1913	1282
1914	1329
1915	1379
1916	1430
1917	1483
1918	1538
1919	1595
1920	1655
1921	1716
1922	1780
1923	1846
1924	1915
1925	1986
1926	2059
1927	2136
1928	2215
1929	2298
1930	2383
1931	2471
1932	2563
1933	2658
1934	2757
1935	2860
1936	2966
1937	3076
1938	3190
1939	3309
1940	3432
1941	3559
1942	3691
1943	3828
1944	3971
1945	4118
1946	4271
1947	4430
1948	4594
1949	4765
1950	4942
1951	5217
1952	5297
1953	5386
1954	5617
1955	5593
1956	5537
1957	5649
1958	5684
1959	5825
1960	6116
1961	5623
1962	5959
1963	6353
1964	6430
1965	6292
1966	6291
1967	6154
1968	6517
1969	6345
1970	6642
1971	7520
1972	7786
1973	8331
1974	8278
1975	8401
1976	9063
1977	9538
1978	10040
1979	11530
1980	11050
1981	10450
1982	10240
1983	10170
1984	10550
1985	11540
1986	11560
1987	11620
1988	12190
1989	13360
1990	14290
1991	14490
1992	15460
1993	16240
1994	15430
1995	15280
1996	16560
1997	18360
1998	18450
1999	18430
2000	19050
2001	18600
2002	18480
2003	17380
2004	16940
2005	18390
2006	19700
2007	21640
2008	20710
2009	20400
2010	21020
2011	22420
2012	22790
2013	23340
2014	23920
2015	24550
2016	25160
2017	25770
2018	26370
2019	26970