Year	Measure
1800	1157
1801	1157
1802	1157
1803	1157
1804	1157
1805	1157
1806	1157
1807	1157
1808	1157
1809	1157
1810	1157
1811	1157
1812	1157
1813	1157
1814	1157
1815	1157
1816	1157
1817	1157
1818	1157
1819	1157
1820	1157
1821	1159
1822	1161
1823	1164
1824	1166
1825	1168
1826	1170
1827	1173
1828	1175
1829	1177
1830	1179
1831	1181
1832	1184
1833	1186
1834	1188
1835	1190
1836	1193
1837	1195
1838	1197
1839	1199
1840	1202
1841	1204
1842	1206
1843	1208
1844	1211
1845	1213
1846	1215
1847	1218
1848	1220
1849	1222
1850	1225
1851	1227
1852	1229
1853	1232
1854	1234
1855	1236
1856	1239
1857	1241
1858	1243
1859	1246
1860	1248
1861	1250
1862	1253
1863	1255
1864	1257
1865	1260
1866	1262
1867	1265
1868	1267
1869	1269
1870	1272
1871	1278
1872	1284
1873	1290
1874	1295
1875	1301
1876	1308
1877	1314
1878	1320
1879	1326
1880	1332
1881	1338
1882	1344
1883	1351
1884	1357
1885	1363
1886	1369
1887	1376
1888	1382
1889	1389
1890	1395
1891	1401
1892	1408
1893	1414
1894	1421
1895	1428
1896	1434
1897	1441
1898	1448
1899	1454
1900	1461
1901	1468
1902	1475
1903	1481
1904	1488
1905	1495
1906	1502
1907	1509
1908	1516
1909	1523
1910	1530
1911	1537
1912	1578
1913	1728
1914	1766
1915	1800
1916	1912
1917	1984
1918	1861
1919	2222
1920	2131
1921	2063
1922	2211
1923	2130
1924	2035
1925	2306
1926	2527
1927	2402
1928	2667
1929	3229
1930	3140
1931	2972
1932	2681
1933	2764
1934	2956
1935	2619
1936	2837
1937	2512
1938	2613
1939	3089
1940	2453
1941	2377
1942	3211
1943	2936
1944	2685
1945	2455
1946	2245
1947	2052
1948	2275
1949	2938
1950	2993
1951	2764
1952	2825
1953	2764
1954	2861
1955	2803
1956	2890
1957	2792
1958	2712
1959	2817
1960	2938
1961	3056
1962	3142
1963	3204
1964	3316
1965	3463
1966	3544
1967	3514
1968	3728
1969	3850
1970	3991
1971	4186
1972	4395
1973	4914
1974	5160
1975	5084
1976	5587
1977	5905
1978	6278
1979	6635
1980	7020
1981	7340
1982	7590
1983	7862
1984	8269
1985	7979
1986	7879
1987	8098
1988	8604
1989	9195
1990	9851
1991	10550
1992	11230
1993	12060
1994	12870
1995	13820
1996	14880
1997	15630
1998	14180
1999	14740
2000	15670
2001	15420
2002	15740
2003	16350
2004	17150
2005	17690
2006	18430
2007	19330
2008	20010
2009	19320
2010	20340
2011	21100
2012	22000
2013	22810
2014	23600
2015	24360
2016	25160
2017	25970
2018	26810
2019	27680