Year	Measure
1800	1056
1801	1056
1802	1056
1803	1056
1804	1056
1805	1056
1806	1056
1807	1056
1808	1056
1809	1056
1810	1056
1811	1056
1812	1056
1813	1056
1814	1056
1815	1056
1816	1056
1817	1056
1818	1056
1819	1056
1820	1056
1821	1060
1822	1065
1823	1069
1824	1073
1825	1077
1826	1082
1827	1086
1828	1090
1829	1094
1830	1099
1831	1103
1832	1107
1833	1112
1834	1116
1835	1120
1836	1125
1837	1129
1838	1134
1839	1138
1840	1143
1841	1147
1842	1152
1843	1156
1844	1161
1845	1165
1846	1170
1847	1175
1848	1179
1849	1184
1850	1189
1851	1193
1852	1198
1853	1203
1854	1207
1855	1212
1856	1217
1857	1222
1858	1227
1859	1231
1860	1236
1861	1241
1862	1246
1863	1251
1864	1256
1865	1261
1866	1266
1867	1271
1868	1276
1869	1281
1870	1286
1871	1296
1872	1306
1873	1316
1874	1326
1875	1336
1876	1347
1877	1357
1878	1368
1879	1378
1880	1389
1881	1400
1882	1410
1883	1421
1884	1432
1885	1443
1886	1454
1887	1466
1888	1477
1889	1488
1890	1500
1891	1512
1892	1523
1893	1535
1894	1547
1895	1559
1896	1571
1897	1583
1898	1595
1899	1608
1900	1620
1901	1633
1902	1645
1903	1658
1904	1671
1905	1684
1906	1697
1907	1710
1908	1723
1909	1736
1910	1750
1911	1763
1912	1777
1913	1791
1914	1819
1915	1848
1916	1877
1917	1906
1918	1937
1919	1967
1920	1998
1921	2030
1922	2062
1923	2094
1924	2127
1925	2161
1926	2195
1927	2230
1928	2265
1929	2300
1930	2337
1931	2374
1932	2411
1933	2449
1934	2488
1935	2527
1936	2567
1937	2607
1938	2649
1939	2690
1940	2733
1941	2776
1942	2820
1943	2864
1944	2909
1945	2955
1946	3002
1947	3049
1948	3097
1949	3146
1950	3196
1951	3386
1952	3648
1953	4988
1954	5771
1955	5384
1956	5598
1957	5389
1958	5841
1959	5912
1960	6408
1961	6938
1962	7069
1963	6729
1964	7299
1965	7704
1966	7847
1967	7413
1968	8444
1969	8444
1970	8137
1971	8394
1972	7936
1973	9342
1974	10280
1975	11390
1976	12910
1977	12550
1978	14340
1979	18160
1980	18070
1981	14670
1982	13820
1983	11760
1984	11650
1985	11710
1986	12100
1987	14250
1988	14420
1989	12640
1990	12320
1991	4009
1992	4832
1993	7004
1994	6246
1995	4887
1996	7031
1997	8383
1998	10940
1999	12910
2000	12750
2001	12700
2002	11280
2003	7125
2004	10990
2005	11050
2006	11740
2007	11610
2008	12050
2009	12310
2010	12700
2011	13250
2012	14160
2013	14300
2014	14680
2015	15200
2016	15970
2017	16880
2018	17940
2019	19040