Year	Measure
1820	772.5
1821	776.1
1822	779.8
1823	783.4
1824	787.1
1825	790.8
1826	794.5
1827	798.2
1828	802
1829	805.7
1830	809.5
1831	813.3
1832	817.1
1833	820.9
1834	824.8
1835	828.7
1836	832.5
1837	836.4
1838	840.4
1839	844.3
1840	848.3
1841	852.2
1842	856.2
1843	860.3
1844	864.3
1845	868.3
1846	872.4
1847	876.5
1848	880.6
1849	884.7
1850	888.9
1851	893.1
1852	897.2
1853	901.5
1854	905.7
1855	909.9
1856	914.2
1857	918.5
1858	922.8
1859	927.1
1860	931.5
1861	935.8
1862	940.2
1863	944.6
1864	949.1
1865	953.5
1866	958
1867	962.5
1868	967
1869	971.5
1870	976.1
1871	980.6
1872	985.2
1873	989.9
1874	994.5
1875	999.2
1876	1004
1877	1009
1878	1013
1879	1018
1880	1023
1881	1028
1882	1032
1883	1037
1884	1042
1885	1047
1886	1052
1887	1057
1888	1062
1889	1067
1890	1072
1891	1077
1892	1082
1893	1087
1894	1092
1895	1097
1896	1102
1897	1107
1898	1113
1899	1118
1900	1123
1901	1128
1902	1134
1903	1139
1904	1144
1905	1150
1906	1155
1907	1161
1908	1166
1909	1171
1910	1177
1911	1182
1912	1188
1913	1194
1914	1195
1915	1197
1916	1199
1917	1201
1918	1202
1919	1204
1920	1206
1921	1208
1922	1209
1923	1211
1924	1213
1925	1215
1926	1216
1927	1218
1928	1220
1929	1222
1930	1223
1931	1225
1932	1227
1933	1229
1934	1231
1935	1232
1936	1234
1937	1236
1938	1238
1939	1239
1940	1241
1941	1243
1942	1245
1943	1247
1944	1249
1945	1250
1946	1252
1947	1254
1948	1256
1949	1258
1950	1259
1951	1314
1952	1337
1953	1370
1954	1428
1955	1458
1956	1492
1957	1526
1958	1548
1959	1614
1960	1642
1961	1647
1962	1697
1963	1700
1964	1694
1965	1788
1966	1873
1967	1833
1968	1981
1969	2128
1970	2167
1971	2113
1972	2057
1973	2086
1974	2136
1975	2160
1976	2057
1977	2049
1978	2016
1979	2091
1980	2147
1981	2234
1982	2226
1983	2149
1984	2131
1985	2027
1986	1912
1987	1967
1988	1973
1989	1969
1990	1971
1991	1766
1992	1624
1993	1644
1994	1663
1995	1472
1996	1093
1997	873.2
1998	848.5
1999	775.6
2000	786.6
2001	879.4
2002	1063
2003	1100
2004	1145
2005	1200
2006	1214
2007	1275
2008	1308
2009	1317
2010	1352
2011	1397
2012	1578
2013	1798
2014	2005
2015	2191
2016	2290
2017	2365
2018	2445
2019	2519