Year	Measure
1800	945
1801	945
1802	945
1803	945
1804	945
1805	945
1806	945
1807	945
1808	945
1809	945
1810	945
1811	945
1812	945
1813	945
1814	945
1815	945
1816	945
1817	945
1818	945
1819	945
1820	945
1821	949.4
1822	953.8
1823	958.3
1824	962.7
1825	967.2
1826	971.7
1827	976.2
1828	980.8
1829	985.4
1830	989.9
1831	994.6
1832	999.2
1833	1004
1834	1009
1835	1013
1836	1018
1837	1023
1838	1027
1839	1032
1840	1037
1841	1042
1842	1047
1843	1052
1844	1056
1845	1061
1846	1066
1847	1071
1848	1076
1849	1081
1850	1086
1851	1091
1852	1096
1853	1102
1854	1107
1855	1112
1856	1117
1857	1122
1858	1127
1859	1133
1860	1138
1861	1143
1862	1149
1863	1154
1864	1159
1865	1165
1866	1170
1867	1176
1868	1181
1869	1187
1870	1192
1871	1198
1872	1203
1873	1209
1874	1214
1875	1220
1876	1226
1877	1232
1878	1237
1879	1243
1880	1249
1881	1255
1882	1260
1883	1266
1884	1272
1885	1278
1886	1284
1887	1290
1888	1296
1889	1302
1890	1308
1891	1314
1892	1320
1893	1327
1894	1333
1895	1339
1896	1345
1897	1351
1898	1358
1899	1364
1900	1370
1901	1377
1902	1383
1903	1390
1904	1396
1905	1403
1906	1409
1907	1416
1908	1422
1909	1429
1910	1436
1911	1442
1912	1449
1913	1456
1914	1465
1915	1474
1916	1484
1917	1493
1918	1502
1919	1512
1920	1521
1921	1531
1922	1541
1923	1550
1924	1560
1925	1570
1926	1580
1927	1590
1928	1600
1929	1610
1930	1620
1931	1631
1932	1641
1933	1651
1934	1662
1935	1672
1936	1683
1937	1693
1938	1704
1939	1715
1940	1726
1941	1737
1942	1747
1943	1759
1944	1770
1945	1781
1946	1792
1947	1803
1948	1815
1949	1826
1950	1838
1951	1824
1952	2011
1953	2050
1954	2059
1955	1919
1956	2017
1957	1911
1958	2129
1959	2007
1960	2214
1961	2367
1962	2274
1963	2565
1964	2620
1965	2725
1966	2727
1967	2647
1968	2861
1969	2902
1970	3012
1971	3268
1972	3771
1973	3662
1974	3863
1975	4033
1976	4236
1977	4274
1978	4453
1979	4636
1980	4854
1981	4995
1982	4876
1983	5011
1984	5058
1985	5213
1986	5009
1987	5219
1988	5112
1989	5197
1990	5502
1991	5604
1992	5920
1993	5932
1994	6011
1995	6055
1996	6393
1997	6649
1998	6879
1999	7201
2000	7455
2001	7680
2002	7726
2003	8094
2004	8468
2005	8707
2006	9109
2007	9585
2008	9938
2009	10190
2010	10410
2011	10240
2012	10500
2013	10650
2014	10830
2015	11170
2016	11520
2017	11880
2018	12260
2019	12650