Year	Measure
1800	1024
1801	1024
1802	1024
1803	1024
1804	1024
1805	1024
1806	1024
1807	1024
1808	1024
1809	1024
1810	1024
1811	1024
1812	1024
1813	1024
1814	1024
1815	1024
1816	1024
1817	1024
1818	1024
1819	1024
1820	1024
1821	1035
1822	1046
1823	1057
1824	1068
1825	1079
1826	1091
1827	1102
1828	1114
1829	1125
1830	1137
1831	1149
1832	1161
1833	1174
1834	1186
1835	1198
1836	1211
1837	1224
1838	1237
1839	1250
1840	1263
1841	1276
1842	1290
1843	1303
1844	1317
1845	1331
1846	1345
1847	1359
1848	1373
1849	1388
1850	1402
1851	1417
1852	1432
1853	1447
1854	1462
1855	1478
1856	1493
1857	1509
1858	1525
1859	1541
1860	1557
1861	1573
1862	1590
1863	1607
1864	1623
1865	1641
1866	1658
1867	1675
1868	1693
1869	1711
1870	1729
1871	1747
1872	1765
1873	1784
1874	1803
1875	1822
1876	1841
1877	1860
1878	1880
1879	1899
1880	1919
1881	1940
1882	1960
1883	1981
1884	2002
1885	2023
1886	2044
1887	2065
1888	2087
1889	2109
1890	2131
1891	2154
1892	2176
1893	2199
1894	2222
1895	2246
1896	2269
1897	2293
1898	2317
1899	2342
1900	2366
1901	2391
1902	2417
1903	2442
1904	2468
1905	2494
1906	2520
1907	2546
1908	2573
1909	2600
1910	2628
1911	2655
1912	2683
1913	2711
1914	2740
1915	2769
1916	2798
1917	2827
1918	2857
1919	2887
1920	2918
1921	3029
1922	2731
1923	2922
1924	3049
1925	3368
1926	2883
1927	2897
1928	3669
1929	4039
1930	3265
1931	3011
1932	2709
1933	3360
1934	3007
1935	2972
1936	2302
1937	2431
1938	2483
1939	2969
1940	3167
1941	3424
1942	3221
1943	3452
1944	3342
1945	3284
1946	3455
1947	3359
1948	3578
1949	3411
1950	3729
1951	3864
1952	4385
1953	4357
1954	4621
1955	4781
1956	4634
1957	4872
1958	4737
1959	4660
1960	4577
1961	4767
1962	5121
1963	5499
1964	5949
1965	6311
1966	6315
1967	6543
1968	6424
1969	6636
1970	6489
1971	6592
1972	6606
1973	6743
1974	7468
1975	7222
1976	7354
1977	7730
1978	6974
1979	4965
1980	4972
1981	5065
1982	4890
1983	5004
1984	4788
1985	4489
1986	4299
1987	4165
1988	3607
1989	3462
1990	3319
1991	3148
1992	3058
1993	2956
1994	2986
1995	3035
1996	3095
1997	3175
1998	3229
1999	3774
2000	3510
2001	3538
2002	3487
2003	3501
2004	3607
2005	3679
2006	3824
2007	3986
2008	4092
2009	3952
2010	4047
2011	4215
2012	4386
2013	4522
2014	4653
2015	4789
2016	4916
2017	5047
2018	5182
2019	5322