Year	Measure
1800	1923
1801	1927
1802	1930
1803	1934
1804	1937
1805	1941
1806	1944
1807	1948
1808	1952
1809	1955
1810	1959
1811	1962
1812	1966
1813	1970
1814	1973
1815	1977
1816	1981
1817	1984
1818	1988
1819	1992
1820	1995
1821	2119
1822	1961
1823	1950
1824	1902
1825	1911
1826	1967
1827	1976
1828	1850
1829	1951
1830	1911
1831	1894
1832	2028
1833	2023
1834	1994
1835	2095
1836	2131
1837	2152
1838	2195
1839	2156
1840	2316
1841	2247
1842	2199
1843	2277
1844	2341
1845	2420
1846	2568
1847	2795
1848	2177
1849	2168
1850	2273
1851	2230
1852	2519
1853	2796
1854	3130
1855	3295
1856	3415
1857	3292
1858	3068
1859	3069
1860	3263
1861	3327
1862	3441
1863	3532
1864	3589
1865	3522
1866	3664
1867	3605
1868	3849
1869	3609
1870	3481
1871	3641
1872	3833
1873	3779
1874	3935
1875	3854
1876	3805
1877	3787
1878	3574
1879	3536
1880	3748
1881	3987
1882	4121
1883	3940
1884	3733
1885	3622
1886	3574
1887	3602
1888	3685
1889	3695
1890	3830
1891	3871
1892	3952
1893	3802
1894	4170
1895	4084
1896	4212
1897	4088
1898	4328
1899	4479
1900	4535
1901	4309
1902	4254
1903	4392
1904	4476
1905	4587
1906	4520
1907	4881
1908	4860
1909	5012
1910	4767
1911	5250
1912	5684
1913	5633
1914	4722
1915	4157
1916	4763
1917	4717
1918	4040
1919	4454
1920	4758
1921	4519
1922	5414
1923	5665
1924	6282
1925	6321
1926	6532
1927	6394
1928	6766
1929	7336
1930	7078
1931	6760
1932	6163
1933	6342
1934	6118
1935	5964
1936	6046
1937	6184
1938	6027
1939	6274
1940	4950
1941	4787
1942	4818
1943	4805
1944	3678
1945	4524
1946	6039
1947	6360
1948	7131
1949	7512
1950	8065
1951	8454
1952	8596
1953	8769
1954	9153
1955	9601
1956	10060
1957	10590
1958	10830
1959	11050
1960	11790
1961	12310
1962	12910
1963	13380
1964	14110
1965	14660
1966	15300
1967	15900
1968	16450
1969	17470
1970	18320
1971	19020
1972	19690
1973	20610
1974	21110
1975	20960
1976	21760
1977	22370
1978	23020
1979	23730
1980	24040
1981	24250
1982	24810
1983	25240
1984	25540
1985	25950
1986	26480
1987	26980
1988	28110
1989	28940
1990	29470
1991	29700
1992	30020
1993	29710
1994	30290
1995	30810
1996	31130
1997	31750
1998	32750
1999	33700
2000	34760
2001	35190
2002	35320
2003	35360
2004	36080
2005	36380
2006	36990
2007	37630
2008	37490
2009	36200
2010	36730
2011	37310
2012	37140
2013	37070
2014	37280
2015	37680
2016	38150
2017	38670
2018	39230
2019	39800
