Year	Measure
1820	488.2
1821	490.5
1822	492.8
1823	495.1
1824	497.4
1825	499.7
1826	502.1
1827	504.4
1828	506.8
1829	509.2
1830	511.6
1831	514
1832	516.4
1833	518.8
1834	521.2
1835	523.7
1836	526.1
1837	528.6
1838	531.1
1839	533.6
1840	536.1
1841	538.6
1842	541.1
1843	543.6
1844	546.2
1845	548.8
1846	551.3
1847	553.9
1848	556.5
1849	559.1
1850	561.7
1851	564.4
1852	567
1853	569.7
1854	572.4
1855	575
1856	577.7
1857	580.4
1858	583.2
1859	585.9
1860	588.6
1861	591.4
1862	594.2
1863	597
1864	599.8
1865	602.6
1866	605.4
1867	608.2
1868	611.1
1869	614
1870	616.8
1871	619.7
1872	622.6
1873	625.6
1874	628.5
1875	631.4
1876	634.4
1877	637.4
1878	640.4
1879	643.4
1880	646.4
1881	649.4
1882	652.5
1883	655.5
1884	658.6
1885	661.7
1886	664.8
1887	667.9
1888	671
1889	674.2
1890	677.3
1891	680.5
1892	683.7
1893	686.9
1894	690.1
1895	693.4
1896	696.6
1897	699.9
1898	703.2
1899	706.5
1900	709.8
1901	713.1
1902	716.4
1903	719.8
1904	723.2
1905	726.6
1906	730
1907	733.4
1908	736.8
1909	740.3
1910	743.8
1911	747.3
1912	750.8
1913	754.3
1914	755.6
1915	756.9
1916	758.2
1917	759.6
1918	760.9
1919	762.2
1920	763.5
1921	764.9
1922	766.2
1923	767.5
1924	768.9
1925	770.2
1926	771.6
1927	772.9
1928	774.3
1929	775.6
1930	777
1931	778.3
1932	779.7
1933	781.1
1934	782.4
1935	783.8
1936	785.1
1937	786.5
1938	787.9
1939	789.3
1940	790.6
1941	792
1942	793.4
1943	794.8
1944	796.2
1945	797.6
1946	799
1947	800.4
1948	801.7
1949	803.1
1950	804.5
1951	752
1952	777.9
1953	790.7
1954	758.8
1955	786.9
1956	808
1957	819.9
1958	802.5
1959	820
1960	835.1
1961	803.3
1962	812.4
1963	879.6
1964	919.3
1965	912.4
1966	940.9
1967	962.3
1968	957.8
1969	1032
1970	1017
1971	1021
1972	1007
1973	981.8
1974	961.7
1975	918.7
1976	902.5
1977	893.3
1978	823.1
1979	715.6
1980	676.3
1981	685.6
1982	722.4
1983	753.7
1984	667.6
1985	658.6
1986	638.7
1987	654
1988	674.2
1989	696.8
1990	700.2
1991	684
1992	682
1993	713.9
1994	733.8
1995	799.6
1996	846
1997	864.6
1998	879.5
1999	916.7
2000	933
2001	949.2
2002	982.3
2003	992.7
2004	1016
2005	1049
2006	1112
2007	1169
2008	1218
2009	1263
2010	1291
2011	1334
2012	1327
2013	1362
2014	1403
2015	1450
2016	1503
2017	1560
2018	1620
2019	1683