Year	Thousands Of Long Tons
1868	110.000
1869	160.000
1870	215.000
1871	329.000
1872	410.000
1873	573.000
1874	630.000
1875	708.000
1876	828.000
1877	887.000
1878	982.000
1879	1009.00
1880	1295.00
1881	1778.00
1882	2109.00
1883	2008.00
1884	1774.00
1885	1887.00
1886	2264.00
1887	3044.00
1888	3304.00
1889	3571.00
1890	3579.00
1891	3157.00
1892	2920.00
1893	2950.00
1894	3111.00
1895	3260.00
1896	4132.00
1897	4486.00
1898	4566.00
1899	4855.00
1900	4901.00
1901	4904.00
1902	4909.00
1903	5034.00
1904	5027.00
1905	5812.00
1906	6462.00
1907	6523.00
1908	5296.00
1909	5882.00
1910	6374.00
1911	6462.00
1912	6796.00
1913	7664.00
1914	7835.00
1915	8371.00
1916	8834.00
1917	9487.00
1918	9251.00
1919	7731.00
1920	8860.00
1921	3600.00
1922	5795.00
1923	8331.00
1924	8033.00