Year	Years
1800	468.6
1801	468.6
1802	468.6
1803	468.6
1804	468.6
1805	468.6
1806	470
1807	470
1808	470
1809	470
1810	470
1811	470
1812	470
1813	470
1814	470
1815	470
1816	471.4
1817	471.4
1818	471.4
1819	471.4
1820	471.4
1821	471.4
1822	471.4
1823	471.4
1824	471.4
1825	471.4
1826	472.8
1827	472.8
1828	472.8
1829	472.8
1830	472.8
1831	472.8
1832	472.8
1833	472.8
1834	472.8
1835	472.8
1836	474.2
1837	474.2
1838	474.2
1839	474.2
1840	474.2
1841	474.2
1842	474.2
1843	474.2
1844	474.2
1845	475.7
1846	475.7
1847	475.7
1848	475.7
1849	475.7
1850	475.7
1851	475.7
1852	475.7
1853	475.7
1854	475.7
1855	477.1
1856	477.1
1857	477.1
1858	477.1
1859	477.1
1860	477.1
1861	477.1
1862	477.1
1863	477.1
1864	477.1
1865	478.5
1866	478.5
1867	478.5
1868	478.5
1869	478.5
1870	478.5
1871	478.5
1872	478.5
1873	478.5
1874	478.5
1875	480
1876	480
1877	480
1878	480
1879	480
1880	480
1881	480
1882	480
1883	480
1884	480
1885	481.4
1886	481.4
1887	481.4
1888	481.4
1889	481.4
1890	481.4
1891	481.4
1892	481.4
1893	481.4
1894	482.8
1895	482.8
1896	482.7
1897	482.6
1898	482.4
1899	482.1
1900	481.8
1901	481.4
1902	480.9
1903	480.3
1904	481.1
1905	480.4
1906	479.6
1907	478.7
1908	477.8
1909	476.7
1910	475.7
1911	474.6
1912	473.4
1913	472.3
1914	472.6
1915	471.4
1916	470.3
1917	469.1
1918	468
1919	466.9
1920	465.7
1921	464.6
1922	463.5
1923	462.3
1924	462.6
1925	461.4
1926	460.3
1927	459.1
1928	458
1929	456.9
1930	455.7
1931	454.6
1932	453.4
1933	453.6
1934	452.5
1935	451.4
1936	450.2
1937	449.1
1938	447.9
1939	446.8
1940	445.6
1941	444.5
1942	443.3
1943	443.5
1944	442.4
1945	441.2
1946	440.1
1947	438.9
1948	437.8
1949	436.6
1950	435.4
1951	431.7
1957	376.1
1958	370.5
1959	364.9
1960	359.5
1961	353.9
1962	348.6
1963	343.9
1964	338.7
1965	333.5
1966	328.6
1967	323.7
1968	318.7
1969	313.7
1970	309
1971	304.1
1972	299
1973	294
1974	288.8
1975	283.6
1976	278
1977	272.7
1978	267
1979	260.9
1980	255
1981	248.7
1982	242.1
1983	235.1
1984	227.5
1985	219.6
1986	211.3
1987	203.3
1988	195
1989	186.9
1990	179.1
1991	171.5
1992	164.6
1993	158.4
1994	153.3
1995	149.1
1996	145.7
1997	143
1998	140.6
1999	138.2
2000	135.6
2001	132.7
2002	129.4
2003	125.9
2004	122.4
2005	119
2006	115.8
2007	112.9
2008	110.2
2009	107.7
2010	105.2
2011	102.6
2012	100
2013	97.3