Year	Measure
1800	583
1801	583
1802	583
1803	583
1804	583
1805	583
1806	583
1807	583
1808	583
1809	583
1810	583
1811	583
1812	583
1813	583
1814	583
1815	583
1816	583
1817	583
1818	583
1819	583
1820	583
1821	585.7
1822	588.5
1823	591.2
1824	594
1825	596.8
1826	599.6
1827	602.4
1828	605.2
1829	608
1830	610.9
1831	613.7
1832	616.6
1833	619.5
1834	622.4
1835	625.3
1836	628.2
1837	631.2
1838	634.1
1839	637.1
1840	640.1
1841	643.1
1842	646.1
1843	649.1
1844	652.1
1845	655.2
1846	658.2
1847	661.3
1848	664.4
1849	667.5
1850	670.7
1851	673.8
1852	676.9
1853	680.1
1854	683.3
1855	686.5
1856	689.7
1857	692.9
1858	696.2
1859	699.4
1860	702.7
1861	706
1862	709.3
1863	712.6
1864	716
1865	719.3
1866	722.7
1867	726.1
1868	729.5
1869	732.9
1870	736.3
1871	739.7
1872	743.2
1873	746.7
1874	750.2
1875	753.7
1876	757.2
1877	760.8
1878	764.3
1879	767.9
1880	771.5
1881	775.1
1882	778.7
1883	782.4
1884	786
1885	789.7
1886	793.4
1887	797.1
1888	800.8
1889	804.6
1890	808.4
1891	812.1
1892	815.9
1893	819.8
1894	823.6
1895	827.5
1896	831.3
1897	835.2
1898	839.1
1899	843.1
1900	847
1901	851
1902	854.9
1903	858.9
1904	863
1905	867
1906	871.1
1907	875.1
1908	879.2
1909	883.3
1910	887.5
1911	891.6
1912	895.8
1913	900
1914	940
1915	981.8
1916	1025
1917	1071
1918	1119
1919	1168
1920	1220
1921	1275
1922	1331
1923	1390
1924	1452
1925	1517
1926	1584
1927	1655
1928	1728
1929	1805
1930	1885
1931	1969
1932	2057
1933	2148
1934	2244
1935	2343
1936	2448
1937	2556
1938	2670
1939	2789
1940	2913
1941	3042
1942	3177
1943	3319
1944	3466
1945	3620
1946	3781
1947	3949
1948	4125
1949	4308
1950	4500
1951	5111
1952	5806
1953	6595
1954	7491
1955	8509
1956	9665
1957	10980
1958	12470
1959	14160
1960	16090
1961	18270
1962	20760
1963	23580
1964	26780
1965	30420
1966	34550
1967	39250
1968	44580
1969	50640
1970	57520
1971	58060
1972	58640
1973	59290
1974	60050
1975	60930
1976	58510
1977	56240
1978	54080
1979	51980
1980	49870
1981	47770
1982	45690
1983	43640
1984	41600
1985	39610
1986	37650
1987	35760
1988	33950
1989	32240
1990	30650
1991	24300
1992	19950
1993	16430
1994	15560
1995	14180
1996	12420
1997	10990
1998	9952
1999	9308
2000	8671
2001	8076
2002	7257
2003	7261
2004	6936
2005	6097
2006	4897
2007	4925
2008	9657
2009	7920
2010	9523
2011	10880
2012	13070
2013	13570