Year	Years
1800	361
1801	361
1802	361
1803	361
1804	361
1805	361
1806	361
1807	361
1808	361
1809	361
1810	361
1811	361
1812	361
1813	361
1814	361
1815	361
1816	361
1817	361
1818	361
1819	361
1820	361
1821	361
1822	361
1823	361
1824	361
1825	361
1826	361
1827	361
1828	361
1829	361
1830	361
1831	361
1832	361
1833	361
1834	361
1835	361
1836	361
1837	361
1838	361
1839	361
1840	361
1841	361
1842	361
1843	361
1844	361
1845	361
1846	361
1847	361
1848	361
1849	361
1850	361
1851	361
1852	361
1853	361
1854	361
1855	361
1856	361
1857	361
1858	361
1859	361
1860	361
1861	361
1862	361
1863	361
1864	361
1865	361
1866	361
1867	361
1868	361
1869	361
1870	361
1871	361
1872	361
1873	361
1874	361
1875	361
1876	361
1877	361
1878	361
1879	361
1880	361
1881	361
1882	361
1883	361
1884	361
1885	361
1886	361
1887	361
1888	361
1889	361
1890	361
1891	361
1892	361
1893	361
1894	361
1895	360.9
1896	360.9
1897	360.8
1898	360.6
1899	360.4
1900	360.2
1901	359.9
1902	359.5
1903	359.1
1904	358.6
1905	358.1
1906	357.5
1907	356.8
1908	356.1
1909	355.4
1910	354.6
1911	353.8
1912	352.9
1913	352.1
1914	351.2
1915	350.4
1916	349.5
1917	348.7
1918	347.8
1919	347
1920	346.1
1921	335.3
1922	323.6
1923	313.2
1924	303
1925	293.1
1926	282.3
1927	272.7
1928	263.3
1929	253.2
1930	244.2
1931	235.3
1932	226.7
1933	217.3
1934	209
1935	200.9
1936	192.1
1937	184.3
1938	176.6
1939	169.1
1940	160.9
1941	153.8
1942	146.7
1943	139.1
1944	132.4
1945	125.8
1946	119.4
1947	112.5
1948	106.3
1949	100.4
1950	93.95
1960	46.87
1970	30.64
1980	19.3
1981	18
1982	17
1983	16.1
1984	15.3
1985	14.4
1986	13.5
1987	12.7
1988	11.9
1989	11.1
1990	10.4
1991	9.7
1992	9.1
1993	8.5
1994	7.9
1995	7.4
1996	7
1997	6.5
1998	6.2
1999	5.8
2000	5.5
2001	5.2
2002	5
2003	4.7
2004	4.5
2005	4.3
2006	4.1
2007	3.9
2008	3.7
2009	3.5
2010	3.3
2011	3.2
2012	3
2013	2.9