Year	Percentage
1860	99.8000
1861	98.2000
1862	98.2000
1863	98.8000
1864	99.6000
1865	99.7000
1866	98.9000
1867	97.0000
1868	97.1000
1869	96.4000
1870	96.3000
1871	97.5000
1872	98.8000
1873	99.1000
1874	99.2000
1875	99.4000
1876	99.3000
1877	98.8000
1878	96.5000
1879	91.8000
1880	93.9000
1881	94.8000
1882	96.5000
1883	96.4000
1884	95.3000
1885	92.9000
1886	91.8000
1887	93.5000
1888	94.3000
1889	97.0000
1890	97.8000
1891	98.1000
1892	96.9000
1893	96.9000
1894	95.7000
1895	95.6000
1896	98.7000
1897	98.8000
1898	99.1000
1899	98.8000
1900	97.4000
1901	96.1000
1902	96.0000
1903	95.6000
1904	92.7000
1905	92.0000
1906	93.1000
1907	92.7000
1908	88.4000
1909	88.3000
1910	91.7000
1911	95.8000
1912	96.3000
1913	96.7000
1914	96.7000