trade:--

Tons.
1880 ... 644,750
1881 ... 827,072
1882 ... 995,597
1883 ... 1,207,321
1884 ... 1,782,382
1885 ... 2,200,779
1886 ... 2,408,323
1887 ... 3,369,057
1888 ... 3,396,212
1889 ... 3,804,037
1890 ... 4,507,096
1891 ... 4,546,729
1892 ... 5,475,942
1893 ... 6,177,818
1894 ... 6,686,123
1895 ... 6,894,834
1896 ... 6,115,547
1897 ... 7,365,547
1898 ... 8,051,045
1899 ... 8,741,934
1900 ... 8,047,010
1901 ... 8,661,300
1902 ... 8,902,605
1903 ... 10,269,298
1904 ... 10,424,615
1905 ... 11,467,954
1906 ... 12,448,219