Year	Measure
1800	697
1801	697
1802	697
1803	697
1804	697
1805	697
1806	697
1807	697
1808	697
1809	697
1810	697
1811	697
1812	697
1813	697
1814	697
1815	697
1816	697
1817	697
1818	697
1819	697
1820	697
1821	697
1822	697
1823	697
1824	697
1825	697
1826	697
1827	697
1828	697
1829	697
1830	697
1831	697
1832	697
1833	697
1834	697
1835	697
1836	697
1837	697
1838	697
1839	697
1840	697
1841	697
1842	697
1843	697
1844	697
1845	697
1846	697
1847	697
1848	697
1849	697
1850	697
1851	697
1852	697
1853	696.9
1854	696.9
1855	696.9
1856	696.9
1857	696.9
1858	696.9
1859	696.9
1860	696.9
1861	696.9
1862	696.9
1863	696.9
1864	696.9
1865	696.9
1866	696.9
1867	696.9
1868	696.9
1869	696.9
1870	696.9
1871	701.9
1872	706.9
1873	711.9
1874	717
1875	722.1
1876	727.3
1877	732.5
1878	737.7
1879	742.9
1880	748.2
1881	753.6
1882	759
1883	764.4
1884	769.8
1885	775.3
1886	780.9
1887	786.4
1888	792
1889	797.7
1890	803.4
1891	809.1
1892	814.9
1893	820.7
1894	826.5
1895	832.4
1896	838.4
1897	844.4
1898	850.4
1899	856.5
1900	862.6
1901	868.7
1902	874.9
1903	881.2
1904	887.4
1905	893.8
1906	900.2
1907	906.6
1908	913
1909	919.6
1910	926.1
1911	932.7
1912	939.4
1913	946.1
1914	944
1915	941.9
1916	939.8
1917	937.7
1918	935.6
1919	933.5
1920	931.5
1921	929.4
1922	927.3
1923	925.3
1924	923.2
1925	921.2
1926	919.1
1927	917.1
1928	915
1929	913
1930	911
1931	908.9
1932	906.9
1933	904.9
1934	902.9
1935	900.9
1936	898.9
1937	896.9
1938	894.9
1939	892.9
1940	890.9
1941	888.9
1942	887
1943	885
1944	883
1945	881.1
1946	879.1
1947	877.2
1948	875.2
1949	873.3
1950	871.3
1951	887.1
1952	907.7
1953	953
1954	963
1955	971.9
1956	1005
1957	994.3
1958	1039
1959	1056
1960	1066
1961	1076
1962	1085
1963	1093
1964	1100
1965	1107
1966	1164
1967	1125
1968	1112
1969	1140
1970	1147
1971	1111
1972	1122
1973	1092
1974	1136
1975	1126
1976	1148
1977	1154
1978	1176
1979	1174
1980	1118
1981	1090
1982	1195
1983	1131
1984	1209
1985	1251
1986	1272
1987	1290
1988	1357
1989	1353
1990	1418
1991	1471
1992	1493
1993	1512
1994	1596
1995	1611
1996	1655
1997	1681
1998	1672
1999	1686
2000	1754
2001	1804
2002	1758
2003	1772
2004	1795
2005	1798
2006	1792
2007	1818
2008	1894
2009	1944
2010	2002
2011	2044
2012	2118
2013	2160
2014	2223
2015	2288
2016	2357
2017	2438
2018	2521
2019	2609