Year	Measure
1764	1404
1765	1404
1766	1405
1767	1406
1768	1407
1769	1408
1770	1409
1771	1410
1772	1410
1773	1411
1774	1412
1775	1413
1776	1414
1777	1415
1778	1416
1779	1416
1780	1417
1781	1418
1782	1419
1783	1420
1784	1421
1785	1422
1786	1422
1787	1423
1788	1424
1789	1425
1790	1426
1791	1427
1792	1428
1793	1428
1794	1429
1795	1430
1796	1431
1797	1432
1798	1433
1799	1434
1800	1435
1801	1440
1802	1446
1803	1451
1804	1457
1805	1463
1806	1468
1807	1474
1808	1480
1809	1485
1810	1491
1811	1497
1812	1503
1813	1509
1814	1514
1815	1520
1816	1526
1817	1532
1818	1538
1819	1544
1820	1550
1821	1575
1822	1600
1823	1626
1824	1652
1825	1679
1826	1706
1827	1733
1828	1761
1829	1790
1830	1819
1831	1837
1832	1856
1833	1875
1834	1894
1835	1913
1836	1933
1837	1952
1838	1972
1839	1992
1840	2013
1841	2034
1842	2056
1843	2079
1844	2101
1845	2124
1846	2147
1847	2170
1848	2194
1849	2217
1850	2241
1851	2263
1852	2285
1853	2307
1854	2329
1855	2351
1856	2374
1857	2397
1858	2420
1859	2443
1860	2467
1861	2484
1862	2501
1863	2518
1864	2535
1865	2553
1866	2570
1867	2588
1868	2606
1869	2624
1870	2642
1871	2813
1872	2815
1873	2731
1874	2834
1875	2829
1876	2874
1877	2953
1878	3031
1879	2991
1880	3013
1881	3116
1882	3115
1883	3222
1884	3287
1885	3246
1886	3330
1887	3538
1888	3509
1889	3454
1890	3619
1891	3720
1892	3771
1893	3765
1894	3951
1895	4025
1896	4053
1897	4106
1898	4303
1899	4360
1900	4362
1901	4345
1902	4478
1903	4481
1904	4513
1905	4728
1906	4871
1907	5130
1908	5113
1909	5057
1910	5090
1911	5206
1912	5422
1913	5361
1914	4448
1915	4104
1916	4065
1917	4001
1918	3952
1919	3495
1920	3732
1921	4100
1922	4451
1923	4397
1924	4893
1925	5208
1926	5280
1927	5423
1928	5658
1929	5721
1930	5547
1931	5086
1932	4547
1933	4383
1934	4411
1935	4496
1936	4633
1937	4882
1938	5506
1939	6336
1940	6125
1941	6524
1942	6161
1943	6288
1944	5888
1945	2668
1946	3027
1947	3351
1948	4277
1949	5094
1950	5733
1951	6125
1952	6137
1953	6400
1954	7046
1955	7817
1956	8348
1957	8843
1958	9137
1959	9361
1960	10080
1961	10560
1962	10750
1963	11120
1964	11710
1965	11960
1966	12550
1967	12830
1968	13340
1969	14130
1970	15080
1971	15780
1972	16660
1973	17380
1974	18030
1975	18020
1976	18870
1977	19750
1978	19690
1979	20800
1980	21280
1981	21220
1982	21600
1983	22270
1984	22340
1985	22820
1986	23330
1987	23690
1988	24370
1989	25310
1990	26130
1991	26740
1992	27040
1993	26880
1994	27460
1995	27920
1996	28600
1997	29100
1998	30110
1999	31040
2000	32010
2001	32200
2002	32420
2003	32740
2004	33460
2005	34110
2006	35180
2007	36340
2008	36700
2009	35200
2010	35820
2011	36640
2012	36730
2013	36940
2014	37390
2015	37810
2016	38240
2017	38620
2018	38990
