Year	Measure
1770	1505
1780	1523
1790	1383
1791	1414
1792	1392
1793	1349
1794	1370
1795	1405
1796	1409
1797	1427
1798	1457
1799	1414
1800	1340
1801	1322
1802	1366
1803	1405
1804	1466
1805	1418
1806	1453
1807	1427
1808	1509
1809	1514
1810	1396
1811	1353
1812	1379
1813	1418
1814	1436
1815	1375
1816	1353
1817	1366
1818	1466
1819	1457
1820	1453
1821	1431
1822	1449
1823	1462
1824	1496
1825	1479
1826	1518
1827	1496
1828	1479
1829	1470
1830	1453
1831	1501
1832	1518
1833	1523
1834	1536
1835	1579
1836	1431
1837	1392
1838	1418
1839	1405
1840	1449
1841	1479
1842	1483
1843	1409
1844	1409
1845	1422
1846	1409
1847	1449
1848	1444
1849	1436
1850	1357
1851	1362
1852	1340
1853	1309
1854	1227
1855	1240
1856	1244
1857	1331
1858	1383
1859	1340
1860	1335
1861	1449
1862	1492
1863	1523
1864	1496
1865	1575
1866	1466
1867	1479
1868	1488
1869	1527
1870	1601
1871	1592
1872	1566
1873	1566
1874	1675
1875	1640
1876	1579
1877	1601
1878	1684
1879	1679
1880	1723
1881	1771
1882	1810
1883	1831
1884	1775
1885	1827
1886	1914
1887	1940
1888	1918
1889	1849
1890	1897
1891	1945
1892	1931
1893	1979
1894	1988
1895	2010
1896	2032
1897	2045
1898	2053
1899	2079
1900	2127
1901	2166
1902	2214
1903	2271
1904	2340
1905	2414
1906	2480
1907	2558
1908	2593
1909	2636
1910	2641
1911	2671
1912	2762
1913	2871
1914	3134
1915	3156
1916	3517
1917	3757
1918	4143
1919	3600
1920	3229
1921	3269
1922	3419
1923	3438
1924	3410
1925	3564
1926	3561
1927	3579
1928	3782
1929	3882
1930	3665
1931	3697
1932	3833
1933	3799
1934	3826
1935	4126
1936	4218
1937	4388
1938	4397
1939	4653
1940	4495
1941	4384
1942	4378
1943	4125
1944	3499
1945	2730
1946	3418
1947	3892
1948	4109
1949	4219
1950	4461
1951	4720
1952	4931
1953	5222
1954	5436
1955	5734
1956	5958
1957	6249
1958	6518
1959	6886
1960	7315
1961	7820
1962	8244
1963	8637
1964	8822
1965	9012
1966	9504
1967	10020
1968	10690
1969	11270
1970	11790
1971	11940
1972	12270
1973	13130
1974	13610
1975	13160
1976	14020
1977	14260
1978	14830
1979	15710
1980	16200
1981	16360
1982	16540
1983	16720
1984	17530
1985	18080
1986	18480
1987	19210
1988	20290
1989	21170
1990	21560
1991	21760
1992	22010
1993	21830
1994	22470
1995	23680
1996	23900
1997	24680
1998	25410
1999	26130
2000	27160
2001	27780
2002	27970
2003	27840
2004	27890
2005	27750
2006	28220
2007	28510
2008	27950
2009	26230
2010	26550
2011	26520
2012	25810
2013	25360
2014	25420
2015	25670
2016	25980
2017	26300
2018	26570
