Year	Measure
1800	1278
1801	1278
1802	1278
1803	1278
1804	1278
1805	1278
1806	1278
1807	1278
1808	1278
1809	1278
1810	1278
1811	1278
1812	1278
1813	1278
1814	1278
1815	1278
1816	1278
1817	1278
1818	1278
1819	1278
1820	1278
1821	1286
1822	1295
1823	1303
1824	1312
1825	1321
1826	1329
1827	1338
1828	1347
1829	1356
1830	1365
1831	1374
1832	1383
1833	1392
1834	1401
1835	1411
1836	1420
1837	1429
1838	1439
1839	1448
1840	1458
1841	1467
1842	1477
1843	1487
1844	1497
1845	1507
1846	1517
1847	1527
1848	1537
1849	1547
1850	1557
1851	1567
1852	1578
1853	1588
1854	1599
1855	1609
1856	1620
1857	1631
1858	1641
1859	1652
1860	1663
1861	1674
1862	1685
1863	1696
1864	1707
1865	1719
1866	1730
1867	1742
1868	1753
1869	1765
1870	1776
1871	1788
1872	1800
1873	1812
1874	1824
1875	1836
1876	1848
1877	1860
1878	1872
1879	1885
1880	1897
1881	1910
1882	1922
1883	1935
1884	1948
1885	1961
1886	1974
1887	1987
1888	2000
1889	2013
1890	2026
1891	2040
1892	2053
1893	2067
1894	2080
1895	2094
1896	2108
1897	2122
1898	2136
1899	2150
1900	2164
1901	2179
1902	2193
1903	2207
1904	2222
1905	2237
1906	2252
1907	2266
1908	2281
1909	2296
1910	2312
1911	2327
1912	2342
1913	2358
1914	2393
1915	2429
1916	2465
1917	2501
1918	2539
1919	2576
1920	2615
1921	2654
1922	2693
1923	2733
1924	2774
1925	2815
1926	2857
1927	2900
1928	2943
1929	2987
1930	3031
1931	3077
1932	3122
1933	3169
1934	3216
1935	3264
1936	3313
1937	3362
1938	3412
1939	3463
1940	3514
1941	3567
1942	3620
1943	3674
1944	3728
1945	3784
1946	3840
1947	3898
1948	3956
1949	4014
1950	4074
1951	3962
1952	3853
1953	3747
1954	3644
1955	3544
1956	3447
1957	3352
1958	3260
1959	3170
1960	3083
1961	3139
1962	3091
1963	2645
1964	2876
1965	3106
1966	3196
1967	3263
1968	3231
1969	3398
1970	3494
1971	3566
1972	3423
1973	3447
1974	3694
1975	3982
1976	4013
1977	3874
1978	3772
1979	3677
1980	3724
1981	3772
1982	3276
1983	3060
1984	2917
1985	3002
1986	2994
1987	3044
1988	2954
1989	2825
1990	2749
1991	2915
1992	3136
1993	3380
1994	3655
1995	3830
1996	4131
1997	4395
1998	4329
1999	4466
2000	4408
2001	4504
2002	4544
2003	4488
2004	4628
2005	4535
2006	4752
2007	5070
2008	5149
2009	5310
2010	5525
2011	5808
2012	6037
2013	6327
2014	6598
2015	6840
2016	7152
2017	7440
2018	7733
2019	7961
