Year	Measure
1800	1403
1801	1403
1802	1403
1803	1403
1804	1403
1805	1403
1806	1403
1807	1403
1808	1403
1809	1403
1810	1403
1811	1403
1812	1403
1813	1403
1814	1403
1815	1403
1816	1403
1817	1403
1818	1403
1819	1403
1820	1403
1821	1412
1822	1421
1823	1430
1824	1439
1825	1448
1826	1457
1827	1466
1828	1475
1829	1484
1830	1494
1831	1503
1832	1512
1833	1522
1834	1531
1835	1541
1836	1551
1837	1560
1838	1570
1839	1580
1840	1590
1841	1600
1842	1610
1843	1620
1844	1630
1845	1640
1846	1650
1847	1661
1848	1671
1849	1682
1850	1692
1851	1703
1852	1713
1853	1724
1854	1735
1855	1746
1856	1757
1857	1768
1858	1779
1859	1790
1860	1801
1861	1812
1862	1824
1863	1835
1864	1847
1865	1858
1866	1870
1867	1882
1868	1893
1869	1905
1870	1917
1871	1929
1872	1941
1873	1953
1874	1966
1875	1978
1876	1990
1877	2003
1878	2015
1879	2028
1880	2041
1881	2053
1882	2066
1883	2079
1884	2092
1885	2105
1886	2118
1887	2132
1888	2145
1889	2158
1890	2172
1891	2186
1892	2199
1893	2213
1894	2227
1895	2241
1896	2255
1897	2269
1898	2283
1899	2297
1900	2312
1901	2326
1902	2341
1903	2355
1904	2370
1905	2385
1906	2400
1907	2415
1908	2430
1909	2445
1910	2461
1911	2476
1912	2492
1913	2507
1914	2523
1915	2539
1916	2555
1917	2571
1918	2587
1919	2603
1920	2619
1921	2636
1922	2652
1923	2669
1924	2685
1925	2702
1926	2719
1927	2736
1928	2753
1929	2770
1930	2788
1931	2805
1932	2823
1933	2840
1934	2858
1935	2876
1936	2894
1937	2912
1938	2930
1939	2949
1940	3075
1941	2999
1942	3084
1943	3388
1944	3342
1945	3273
1946	3570
1947	3854
1948	4263
1949	4219
1950	4224
1951	4161
1952	4555
1953	4531
1954	4769
1955	4764
1956	4808
1957	4889
1958	4894
1959	5014
1960	5189
1961	5167
1962	5284
1963	5261
1964	5466
1965	5817
1966	5794
1967	5922
1968	6066
1969	6210
1970	6451
1971	6625
1972	6829
1973	7460
1974	7670
1975	7844
1976	8359
1977	8638
1978	8980
1979	9205
1980	9362
1981	9480
1982	9329
1983	8892
1984	9012
1985	9150
1986	9177
1987	8382
1988	9042
1989	8828
1990	8848
1991	9107
1992	9186
1993	9191
1994	9400
1995	9487
1996	9481
1997	9608
1998	9465
1999	8626
2000	7263
2001	7516
2002	7466
2003	7644
2004	8161
2005	8448
2006	8692
2007	8751
2008	9171
2009	9129
2010	9289
2011	9882
2012	10220
2013	10480
2014	10750
2015	10950
2016	11160
2017	11380
2018	11610
2019	11850