Year	Measure
1800	882
1801	882
1802	882
1803	882
1804	882
1805	882
1806	882
1807	882
1808	882
1809	882
1810	882
1811	882
1812	882
1813	882
1814	882
1815	882
1816	882
1817	882
1818	882
1819	882
1820	882
1821	887.9
1822	893.7
1823	899.6
1824	905.6
1825	911.6
1826	917.6
1827	923.7
1828	929.8
1829	935.9
1830	942.1
1831	948.3
1832	954.6
1833	960.9
1834	967.2
1835	973.6
1836	980.1
1837	986.5
1838	993.1
1839	999.6
1840	1006
1841	1013
1842	1020
1843	1026
1844	1033
1845	1040
1846	1047
1847	1054
1848	1061
1849	1068
1850	1075
1851	1082
1852	1089
1853	1096
1854	1103
1855	1111
1856	1118
1857	1125
1858	1133
1859	1140
1860	1148
1861	1155
1862	1163
1863	1171
1864	1179
1865	1186
1866	1194
1867	1202
1868	1210
1869	1218
1870	1226
1871	1234
1872	1242
1873	1250
1874	1259
1875	1267
1876	1275
1877	1284
1878	1292
1879	1301
1880	1309
1881	1318
1882	1327
1883	1336
1884	1344
1885	1353
1886	1362
1887	1371
1888	1380
1889	1389
1890	1399
1891	1408
1892	1417
1893	1427
1894	1436
1895	1445
1896	1455
1897	1465
1898	1474
1899	1484
1900	1494
1901	1504
1902	1514
1903	1524
1904	1534
1905	1544
1906	1554
1907	1564
1908	1575
1909	1585
1910	1596
1911	1606
1912	1617
1913	1627
1914	1643
1915	1659
1916	1675
1917	1691
1918	1707
1919	1723
1920	1740
1921	1757
1922	1774
1923	1791
1924	1808
1925	1825
1926	1843
1927	1860
1928	1878
1929	1896
1930	1914
1931	1933
1932	1951
1933	1970
1934	1989
1935	2008
1936	2027
1937	2047
1938	2066
1939	2086
1940	2106
1941	2127
1942	2147
1943	2168
1944	2188
1945	2209
1946	2231
1947	2252
1948	2274
1949	2295
1950	2317
1951	2396
1952	2478
1953	2562
1954	2649
1955	2739
1956	2832
1957	2928
1958	3028
1959	3131
1960	3237
1961	3334
1962	3413
1963	3162
1964	3243
1965	3238
1966	3205
1967	2870
1968	3027
1969	3082
1970	3378
1971	3441
1972	4282
1973	3765
1974	3395
1975	3103
1976	3388
1977	3449
1978	3821
1979	3912
1980	3956
1981	4165
1982	4333
1983	4491
1984	4720
1985	4968
1986	5251
1987	5436
1988	6168
1989	6261
1990	6520
1991	6510
1992	6951
1993	6918
1994	6671
1995	6700
1996	6753
1997	7610
1998	7963
1999	8271
2000	8377
2001	8385
2002	8682
2003	8908
2004	9405
2005	9597
2006	10130
2007	10390
2008	10330
2009	10090
2010	9844
2011	9874
2012	10010
2013	10220
2014	10450
2015	10740
2016	11070
2017	11430
2018	11790
2019	12160