Year	Measure
1800	1026
1801	1026
1802	1026
1803	1026
1804	1026
1805	1026
1806	1026
1807	1026
1808	1026
1809	1026
1810	1026
1811	1026
1812	1026
1813	1026
1814	1026
1815	1026
1816	1026
1817	1026
1818	1026
1819	1026
1820	1026
1821	1034
1822	1043
1823	1051
1824	1060
1825	1069
1826	1078
1827	1087
1828	1096
1829	1105
1830	1114
1831	1123
1832	1132
1833	1142
1834	1151
1835	1161
1836	1170
1837	1180
1838	1190
1839	1200
1840	1209
1841	1219
1842	1230
1843	1240
1844	1250
1845	1260
1846	1271
1847	1281
1848	1292
1849	1303
1850	1313
1851	1324
1852	1335
1853	1346
1854	1357
1855	1369
1856	1380
1857	1391
1858	1403
1859	1415
1860	1426
1861	1438
1862	1450
1863	1462
1864	1474
1865	1486
1866	1499
1867	1511
1868	1523
1869	1536
1870	1549
1871	1562
1872	1575
1873	1588
1874	1601
1875	1614
1876	1627
1877	1641
1878	1654
1879	1668
1880	1682
1881	1696
1882	1710
1883	1724
1884	1738
1885	1753
1886	1767
1887	1782
1888	1797
1889	1811
1890	1826
1891	1842
1892	1857
1893	1872
1894	1888
1895	1903
1896	1919
1897	1935
1898	1951
1899	1967
1900	1983
1901	2000
1902	2016
1903	2033
1904	2050
1905	2067
1906	2084
1907	2101
1908	2119
1909	2136
1910	2154
1911	2172
1912	2190
1913	2208
1914	2226
1915	2244
1916	2263
1917	2282
1918	2301
1919	2320
1920	2339
1921	2306
1922	2383
1923	2443
1924	2552
1925	2321
1926	2682
1927	2322
1928	2645
1929	2611
1930	2621
1931	2318
1932	2065
1933	2313
1934	2357
1935	2561
1936	2471
1937	2671
1938	2451
1939	2597
1940	2787
1941	2694
1942	2874
1943	3097
1944	2887
1945	2736
1946	2748
1947	3417
1948	4282
1949	3825
1950	3734
1951	3712
1952	3887
1953	4053
1954	3987
1955	4074
1956	4268
1957	4363
1958	4326
1959	4384
1960	4424
1961	4436
1962	4816
1963	4868
1964	5162
1965	5269
1966	5447
1967	5558
1968	5542
1969	5533
1970	5485
1971	5574
1972	5764
1973	5875
1974	6110
1975	6280
1976	6352
1977	6553
1978	6809
1979	6534
1980	5904
1981	5482
1982	5226
1983	5207
1984	5246
1985	5280
1986	5240
1987	5280
1988	5283
1989	5246
1990	5314
1991	5373
1992	5667
1993	5924
1994	6167
1995	6430
1996	6424
1997	6573
1998	6693
1999	6791
2000	6811
2001	6800
2002	6824
2003	6823
2004	6822
2005	6890
2006	7136
2007	7373
2008	7431
2009	7170
2010	7240
2011	7352
2012	7447
2013	7536
2014	7624
2015	7723
2016	7830
2017	7954
2018	8081
2019	8209