Year	Years
1800	452
1801	452
1802	452
1803	452
1804	452
1805	452
1806	452
1807	452
1808	452
1809	452
1810	452
1811	452
1812	452
1813	452
1814	452
1815	452
1816	452
1817	452
1818	452
1819	452
1820	452
1821	452
1822	452
1823	452
1824	452
1825	452
1826	452
1827	452
1828	452
1829	452
1830	452
1831	452
1832	452
1833	452
1834	452
1835	452
1836	452
1837	452
1838	452
1839	452
1840	452
1841	452
1842	452
1843	452
1844	452
1845	452
1846	452
1847	452
1848	452
1849	452
1850	452
1851	452
1852	452
1853	452
1854	452
1855	452
1856	452
1857	452
1858	452
1859	452
1860	452
1861	452
1862	452
1863	452
1864	452
1865	452
1866	452
1867	452
1868	452
1869	452
1870	452
1871	452
1872	452
1873	452
1874	452
1875	452
1876	452
1877	452
1878	452
1879	452
1880	452
1881	452
1882	452
1883	452
1884	452
1885	452
1886	452
1887	452
1888	452
1889	452
1890	452
1891	452
1892	452
1893	452
1894	451.9
1895	451.9
1896	451.9
1897	451.7
1898	451.6
1899	451.3
1900	451
1901	450.6
1902	450.1
1903	449.6
1904	449
1905	448.3
1906	447.6
1907	446.8
1908	445.9
1909	444.9
1910	444
1911	442.9
1912	441.9
1913	440.8
1914	439.8
1915	438.7
1916	437.6
1917	436.6
1918	435.5
1919	434.5
1920	433.4
1921	432.3
1922	431.3
1923	430.2
1924	429.2
1925	428.1
1926	427
1927	426
1928	424.9
1929	423.9
1930	422.8
1931	421.7
1932	420.7
1933	419.6
1934	418.6
1935	417.5
1936	416.4
1937	415.4
1938	414.3
1939	413.2
1940	412.2
1941	411.1
1942	410.1
1943	409
1944	407.9
1945	406.9
1946	396.1
1947	386.7
1948	376.4
1949	367.3
1950	357.4
1951	354.2
1952	348.9
1953	343.1
1954	337
1955	330.6
1956	323.8
1957	316.6
1958	309.2
1959	301.9
1960	294.6
1961	287.5
1962	280.5
1963	273.5
1964	266.6
1965	259.7
1966	252.8
1967	246
1968	239.6
1969	233.5
1970	227.8
1971	223.2
1972	218.3
1982	190.3
1983	188.9
1984	187.3
1985	186.5
1986	185.6
1987	185.1
1988	184.2
1989	182.3
1990	179.7
1991	176.8
1992	174.7
1993	173.8
1994	173.6
1995	173.6
1996	173.6
1997	173.6
1998	173.6
1999	173.6
2000	173.6
2001	173.6
2002	173.6
2003	173.6
2004	173.6
2005	173.6
2006	173
2007	171.2
2008	167.8
2009	163.6
2010	159
2011	154.7
2012	150.1
2013	145.6