Year	Measure
1800	797.3
1801	797.3
1802	797.3
1803	797.3
1804	797.3
1805	797.3
1806	797.3
1807	797.3
1808	797.3
1809	797.3
1810	797.3
1811	797.3
1812	797.3
1813	797.3
1814	797.3
1815	797.3
1816	797.3
1817	797.3
1818	797.3
1819	797.3
1820	797.3
1821	798.3
1822	799.3
1823	800.4
1824	801.4
1825	802.4
1826	803.5
1827	804.5
1828	805.6
1829	806.6
1830	807.6
1831	808.7
1832	809.7
1833	810.8
1834	811.8
1835	812.9
1836	813.9
1837	815
1838	816
1839	817.1
1840	818.1
1841	819.2
1842	820.2
1843	821.3
1844	822.4
1845	823.4
1846	824.5
1847	825.5
1848	826.6
1849	827.7
1850	828.7
1851	829.8
1852	830.9
1853	832
1854	833
1855	834.1
1856	835.2
1857	836.3
1858	837.3
1859	838.4
1860	839.5
1861	840.6
1862	841.7
1863	842.8
1864	843.9
1865	844.9
1866	846
1867	847.1
1868	848.2
1869	849.3
1870	850.4
1871	861.3
1872	872.3
1873	883.5
1874	894.8
1875	906.2
1876	917.8
1877	929.5
1878	941.4
1879	953.5
1880	965.7
1881	978
1882	990.5
1883	1003
1884	1016
1885	1029
1886	1042
1887	1056
1888	1069
1889	1083
1890	1097
1891	1100
1892	1103
1893	1107
1894	1110
1895	1113
1896	1117
1897	1120
1898	1124
1899	1127
1900	1130
1901	1134
1902	1137
1903	1141
1904	1144
1905	1148
1906	1151
1907	1155
1908	1158
1909	1162
1910	1165
1911	1169
1912	1172
1913	1176
1914	1172
1915	1167
1916	1163
1917	1159
1918	1155
1919	1151
1920	1147
1921	1142
1922	1138
1923	1134
1924	1130
1925	1126
1926	1122
1927	1118
1928	1114
1929	1110
1930	1115
1931	1120
1932	1125
1933	1130
1934	1135
1935	1140
1936	1146
1937	1151
1938	1156
1939	1155
1940	1154
1941	1153
1942	1152
1943	1151
1944	1149
1945	1148
1946	1147
1947	1146
1948	1145
1949	1144
1950	1143
1951	1187
1952	1216
1953	1308
1954	1257
1955	1322
1956	1300
1957	1273
1958	1278
1959	1388
1960	1508
1961	1538
1962	1608
1963	1686
1964	1747
1965	1829
1966	1975
1967	2078
1968	2184
1969	2288
1970	2370
1971	2412
1972	2445
1973	2621
1974	2672
1975	2740
1976	2925
1977	3146
1978	3387
1979	3491
1980	3573
1981	3712
1982	3839
1983	3983
1984	4142
1985	4266
1986	4434
1987	4785
1988	5343
1989	5910
1990	6481
1991	6943
1992	7407
1993	7925
1994	8530
1995	9200
1996	9628
1997	9389
1998	8316
1999	8609
2000	8949
2001	9074
2002	9486
2003	10060
2004	10620
2005	11020
2006	11510
2007	12050
2008	12280
2009	11960
2010	12830
2011	12800
2012	13570
2013	13890
2014	14170
2015	14640
2016	15270
2017	15930
2018	16580
2019	17250