Year	Measure
1800	1490
1801	1491
1802	1492
1803	1493
1804	1494
1805	1495
1806	1496
1807	1497
1808	1498
1809	1499
1810	1500
1811	1501
1812	1502
1813	1503
1814	1504
1815	1505
1816	1506
1817	1508
1818	1509
1819	1510
1820	1511
1821	1521
1822	1531
1823	1541
1824	1552
1825	1562
1826	1572
1827	1583
1828	1594
1829	1604
1830	1615
1831	1626
1832	1637
1833	1648
1834	1659
1835	1670
1836	1681
1837	1692
1838	1704
1839	1715
1840	1727
1841	1738
1842	1750
1843	1762
1844	1774
1845	1786
1846	1797
1847	1810
1848	1822
1849	1834
1850	1846
1851	1859
1852	1871
1853	1884
1854	1896
1855	1909
1856	1922
1857	1935
1858	1948
1859	1961
1860	1974
1861	1987
1862	2000
1863	2014
1864	2027
1865	2041
1866	2055
1867	2069
1868	2082
1869	2096
1870	2110
1871	2131
1872	2152
1873	2174
1874	2195
1875	2217
1876	2239
1877	2261
1878	2283
1879	2306
1880	2329
1881	2352
1882	2375
1883	2398
1884	2422
1885	2446
1886	2470
1887	2494
1888	2519
1889	2544
1890	2569
1891	2595
1892	2620
1893	2646
1894	2672
1895	2699
1896	2725
1897	2752
1898	2779
1899	2807
1900	2835
1901	2863
1902	2891
1903	2919
1904	2948
1905	2977
1906	3007
1907	3037
1908	3067
1909	3097
1910	3128
1911	3158
1912	3190
1913	3221
1914	3099
1915	2982
1916	2869
1917	2761
1918	2878
1919	3001
1920	3128
1921	3261
1922	3400
1923	3457
1924	3514
1925	3572
1926	3632
1927	3692
1928	3754
1929	3816
1930	3880
1931	3944
1932	4010
1933	4076
1934	4144
1935	4213
1936	4283
1937	4355
1938	4427
1939	4501
1940	4575
1941	4652
1942	4729
1943	4808
1944	4888
1945	4969
1946	5051
1947	5135
1948	5221
1949	5308
1950	5396
1951	4712
1952	4873
1953	5460
1954	6099
1955	6413
1956	6095
1957	6036
1958	5041
1959	5321
1960	5316
1961	5513
1962	5570
1963	5463
1964	5630
1965	6012
1966	6231
1967	5759
1968	6290
1969	6242
1970	6480
1971	6898
1972	7543
1973	7679
1974	7701
1975	5290
1976	2203
1977	3756
1978	3817
1979	4280
1980	4496
1981	4491
1982	2823
1983	3385
1984	4864
1985	6035
1986	5648
1987	6560
1988	4709
1989	2702
1990	3519
1991	5001
1992	4289
1993	4414
1994	4625
1995	4851
1996	4941
1997	5424
1998	6112
1999	6491
2000	6832
2001	7590
2002	8517
2003	9361
2004	10900
2005	12040
2006	11920
2007	12740
2008	13740
2009	16180
2010	16460
2011	16430
2012	16520
2013	16530
2014	16530
2015	16780
2016	17290
2017	17810
2018	18350
2019	18900
