Year	Measure
1800	568.6
1801	568.6
1802	568.6
1803	568.6
1804	568.6
1805	568.6
1806	568.6
1807	568.6
1808	568.6
1809	568.6
1810	568.6
1811	568.6
1812	568.6
1813	568.6
1814	568.6
1815	568.6
1816	568.6
1817	568.6
1818	568.6
1819	568.6
1820	568.6
1821	577
1822	585.6
1823	594.3
1824	603.2
1825	612.2
1826	621.3
1827	630.5
1828	639.9
1829	649.4
1830	659.1
1831	668.9
1832	678.9
1833	689
1834	699.2
1835	709.6
1836	720.2
1837	730.9
1838	741.8
1839	752.8
1840	764
1841	775.4
1842	787
1843	798.7
1844	810.6
1845	822.6
1846	834.9
1847	847.3
1848	859.9
1849	872.7
1850	885.7
1851	898.9
1852	912.2
1853	925.8
1854	939.6
1855	953.6
1856	967.8
1857	982.2
1858	996.8
1859	1012
1860	1027
1861	1042
1862	1057
1863	1073
1864	1089
1865	1105
1866	1122
1867	1139
1868	1156
1869	1173
1870	1190
1871	1208
1872	1226
1873	1244
1874	1263
1875	1281
1876	1300
1877	1320
1878	1339
1879	1359
1880	1380
1881	1400
1882	1421
1883	1442
1884	1464
1885	1485
1886	1508
1887	1530
1888	1553
1889	1576
1890	1599
1891	1623
1892	1647
1893	1672
1894	1697
1895	1722
1896	1748
1897	1774
1898	1800
1899	1827
1900	1854
1901	1882
1902	1910
1903	1938
1904	1967
1905	1996
1906	2026
1907	2056
1908	2087
1909	2118
1910	2149
1911	2181
1912	2214
1913	2246
1914	2280
1915	2314
1916	2348
1917	2383
1918	2419
1919	2455
1920	2491
1921	2528
1922	2566
1923	2604
1924	2643
1925	2682
1926	2722
1927	2763
1928	2804
1929	2846
1930	2888
1931	2931
1932	2974
1933	3019
1934	3064
1935	3109
1936	3156
1937	3203
1938	3250
1939	3299
1940	3348
1941	3397
1942	3448
1943	3499
1944	3551
1945	3604
1946	3658
1947	3712
1948	3768
1949	3824
1950	3881
1951	3909
1952	3937
1953	3994
1954	4119
1955	4152
1956	4203
1957	4259
1958	4269
1959	4405
1960	4701
1961	4634
1962	5155
1963	5528
1964	6263
1965	6515
1966	6592
1967	6163
1968	6054
1969	6102
1970	5968
1971	5955
1972	6086
1973	6112
1974	6154
1975	5991
1976	6089
1977	6297
1978	6573
1979	6654
1980	6770
1981	6874
1982	6809
1983	6428
1984	6156
1985	6004
1986	6009
1987	6001
1988	5888
1989	6042
1990	5641
1991	5798
1992	6181
1993	5892
1994	6122
1995	6211
1996	6233
1997	6335
1998	6399
1999	6482
2000	6535
2001	6536
2002	6616
2003	6774
2004	7147
2005	7387
2006	7770
2007	8043
2008	8165
2009	7929
2010	8382
2011	8715
2012	9078
2013	9391
2014	9715
2015	10070
2016	10440
2017	10840
2018	11240
2019	11670