Year	Measure
1800	411
1801	411.2
1802	411.3
1803	411.5
1804	411.7
1805	411.9
1806	412.1
1807	412.2
1808	412.4
1809	412.6
1810	412.8
1811	413
1812	413.1
1813	413.3
1814	413.5
1815	413.7
1816	413.8
1817	414
1818	414.2
1819	414.4
1820	414.6
1821	414.7
1822	414.9
1823	415.1
1824	415.3
1825	415.5
1826	415.6
1827	415.8
1828	416
1829	416.2
1830	416.4
1831	416.5
1832	416.7
1833	416.9
1834	417.1
1835	417.3
1836	417.4
1837	417.6
1838	417.8
1839	418
1840	418.2
1841	418.3
1842	418.5
1843	418.7
1844	418.9
1845	419.1
1846	419.2
1847	419.4
1848	419.6
1849	419.8
1850	420
1851	420.2
1852	420.3
1853	420.5
1854	420.7
1855	420.9
1856	421.1
1857	421.2
1858	421.4
1859	421.6
1860	421.8
1861	422
1862	422.2
1863	422.3
1864	422.5
1865	422.7
1866	422.9
1867	423.1
1868	423.3
1869	423.4
1870	423.6
1871	423.8
1872	424
1873	424.2
1874	424.4
1875	424.5
1876	424.7
1877	424.9
1878	425.1
1879	425.3
1880	425.5
1881	425.6
1882	425.8
1883	426
1884	426.2
1885	426.4
1886	426.6
1887	426.8
1888	426.9
1889	427.1
1890	427.3
1891	427.5
1892	427.7
1893	427.9
1894	428
1895	428.2
1896	428.4
1897	428.6
1898	428.8
1899	429
1900	429.2
1901	429.3
1902	429.5
1903	429.7
1904	429.9
1905	430.1
1906	430.3
1907	430.5
1908	430.6
1909	430.8
1910	431
1911	431.2
1912	431.4
1913	431.6
1914	431.8
1915	432
1916	432.1
1917	432.3
1918	432.5
1919	432.7
1920	432.9
1921	433.1
1922	433.3
1923	433.4
1924	433.6
1925	433.8
1926	434
1927	434.2
1928	434.4
1929	434.6
1930	434.8
1931	435
1932	435.1
1933	435.3
1934	435.5
1935	435.7
1936	435.9
1937	436.1
1938	436.3
1939	436.5
1940	436.6
1941	436.8
1942	437
1943	437.2
1944	437.4
1945	437.6
1946	437.8
1947	438
1948	438.2
1949	438.4
1950	438.5
1951	447.1
1952	455.8
1953	463.9
1954	466.9
1955	487.1
1956	480.6
1957	482.2
1958	495.4
1959	511.8
1960	513.6
1961	517.5
1962	541.6
1963	511.2
1964	522.1
1965	522.7
1966	527.8
1967	551.3
1968	599.2
1969	655.1
1970	674.3
1971	702.6
1972	705.3
1973	724.7
1974	651.6
1975	543.1
1976	500.9
1977	488.7
1978	477.9
1979	470
1980	472.2
1981	470.7
1982	449.7
1983	411.4
1984	395.6
1985	356.1
1986	359.2
1987	379.3
1988	413
1989	431.1
1990	431.2
1991	443.1
1992	399.8
1993	418.5
1994	417.1
1995	408.5
1996	424.1
1997	459.5
1998	505.3
1999	531
2000	528.1
2001	584.9
2002	616.5
2003	653.6
2004	691.2
2005	722.9
2006	770.2
2007	810.1
2008	848.5
2009	884.5
2010	928.6
2011	977.1
2012	1022
2013	1068
2014	1130
2015	1190
2016	1250
2017	1317
2018	1386
2019	1460