Year	Ratio
1800	825.3
1801	834.9
1802	867.8
1803	806.6
1804	789.1
1805	842.1
1806	758
1808	1011
1809	1132
1810	913
1811	922.6
1812	965.2
1813	806.8
1815	780
1816	902.9
1817	925.6
1819	876.7
1820	867
1821	864.4
1822	811.2
1823	884.7
1824	877.5
1825	787.6
1826	784.5
1827	905.8
1828	911
1829	845.7
1830	843.5
1831	884
1832	800.9
1833	1162
1834	844
1835	923.7
1836	912.5
1837	1000
1838	913.7
1839	949.7
1840	897.7
1841	853.6
1842	766.3
1843	869.5
1844	754.8
1845	774.4
1846	875.9
1847	864.5
1848	784.2
1849	702.9
1850	798
1851	757.7
1852	874.8
1853	900.7
1854	857.8
1855	1020
1856	1029
1857	949.5
1858	1092
1859	987.7
1860	933.8
1861	852.2
1862	940.8
1863	857.1
1864	861.1
1865	841
1866	961.7
1867	961.7
1868	1438
1869	962.4
1870	820.4
1871	821.7
1873	755.6
1874	794.1
1876	1067
1877	902
1878	819.6
1879	778.7
1880	874.5
1881	840.7
1882	690.3
1883	705.7
1884	662.9
1885	713.4
1886	840
1887	808.8
1888	755.9
1889	657.4
1890	590.8
1891	602.7
1892	560
1893	627.1
1894	488.2
1895	555.1
1896	499.7
1897	476.1
1898	424.2
1899	505.9
1900	494.6
1901	459.2
1902	483.5
1903	417.1
1904	452.1
1905	401.9
1906	381.8
1907	400.2
1908	389.6
1909	415.8
1910	372.1
1911	425.3
1912	370.6
1913	393.1
1914	411.1
1915	340.9
1916	364.1
1917	378.8
1918	442.8
1919	400.7
1920	360
1921	329.8
1922	303.2
1923	308.7
1924	347.2
1925	293.9
1926	320
1927	296.3
1928	300.6
1929	359.2
1930	327
1931	300.6
1932	294.2
1933	250.6
1934	236.3
1935	241.6
1936	542.9
1937	503.3
1938	430.3
1939	401.7
1940	476.8
1941	343.9
1942	426.4
1943	412.5
1944	443.1
1945	402.1
1946	266.8
1947	214.5
1948	172.6
1949	155.5
1950	145.8
1951	121.4
1952	125.1
1953	133.2
1954	106.9
1955	104.7
1956	111.4
1957	88.5
1958	99.8
1959	67.3
1960	71.8
1961	54.9
1962	51.6
1963	49.8
1964	42.3
1965	25.7
1966	30.9
1967	20.7
1968	28.5
1969	14.8
1970	11.8
1971	10.8
1972	10.2
1973	9.1
1974	8.7
1975	7.6
1976	8.6
1977	6.1
1978	5.7
1979	5.7
1980	7.2
1990	6
1995	5
2000	7
2005	9
2010	6
2013	4