Year	Measure
1800	960.3
1801	960.3
1802	960.3
1803	960.3
1804	960.3
1805	960.3
1806	960.3
1807	960.3
1808	960.3
1809	960.3
1810	960.3
1811	960.3
1812	960.3
1813	960.3
1814	960.3
1815	960.3
1816	960.3
1817	960.3
1818	960.3
1819	960.3
1820	960.3
1821	918.1
1822	923.1
1823	919.4
1824	897.1
1825	923.7
1826	930.6
1827	934.7
1828	927.8
1829	933.2
1830	918.8
1831	917.5
1832	929.4
1833	925.8
1834	945.6
1835	966.8
1836	959.5
1837	982.2
1838	986.5
1839	988.2
1840	1039
1841	1041
1842	1053
1843	1073
1844	1077
1845	1098
1846	1123
1847	1135
1848	1169
1849	1239
1850	1290
1851	1312
1852	1337
1853	1295
1854	1319
1855	1366
1856	1368
1857	1399
1858	1446
1859	1479
1860	1514
1861	1499
1862	1479
1863	1520
1864	1585
1865	1623
1866	1641
1867	1561
1868	1622
1869	1767
1870	1786
1871	1763
1872	1867
1873	1961
1874	1851
1875	1974
1876	1924
1877	1835
1878	1917
1879	2176
1880	2409
1881	2457
1882	2623
1883	2602
1884	2587
1885	2475
1886	2543
1887	2683
1888	2542
1889	2572
1890	2722
1891	2905
1892	2810
1893	2911
1894	2827
1895	2987
1896	2966
1897	2865
1898	3173
1899	3155
1900	3037
1901	3077
1902	3174
1903	2961
1904	3167
1905	3127
1906	3334
1907	3471
1908	3796
1909	3773
1910	4153
1911	3996
1912	4108
1913	4137
1914	3456
1915	3307
1916	4008
1917	4047
1918	4050
1919	3434
1920	3832
1921	3280
1922	3358
1923	3993
1924	4238
1925	4364
1926	3946
1927	3820
1928	4613
1929	4783
1930	3957
1931	3070
1932	2553
1933	3096
1934	3676
1935	3822
1936	3942
1937	4404
1938	4376
1939	4387
1940	4480
1941	4348
1942	4465
1943	4507
1944	4507
1945	4805
1946	5121
1947	4485
1948	5138
1949	4940
1950	5080
1951	5165
1952	5389
1953	5692
1954	5409
1955	5503
1956	5477
1957	5903
1958	6079
1959	5595
1960	5911
1961	6044
1962	6181
1963	6422
1964	6421
1965	6336
1966	6900
1967	6985
1968	7098
1969	7227
1970	7242
1971	7748
1972	7515
1973	6968
1974	6910
1975	5915
1976	6017
1977	6506
1978	6936
1979	7398
1980	7863
1981	8212
1982	6970
1983	6659
1984	6936
1985	6963
1986	7237
1987	7587
1988	8003
1989	8698
1990	8861
1991	9407
1992	10390
1993	10940
1994	11630
1995	12420
1996	13160
1997	13840
1998	14100
1999	13820
2000	14270
2001	14590
2002	14740
2003	15160
2004	15930
2005	16770
2006	17570
2007	18300
2008	18670
2009	18330
2010	19200
2011	20150
2012	21060
2013	21760
2014	22360
2015	23060
2016	23850
2017	24740
2018	25660
2019	26610