Of greater significance are Wolman's figures for organization by industries. These computations show that in 1910 the breweries had 88.8 percent, organized, printing and book binding 34.3 percent, mining 30.5 percent, transportation 17.3 percent, clothing 16.9 percent, building trades 16.2 percent, iron and steel 9.9 percent, metal 4.7 percent, and textile 3.7 percent.[47] By separate occupations, railway conductors, brakemen, and locomotive engineers were from 50-100 percent organized; printers, locomotive firemen, molders and plasterers, from 30-50 percent; bakers, carpenters, plumbers, from 15-30 percent organized.[48] Accompanying the numerical growth of labor organizations was an extension of organization into heretofore untouched trades as well as a branching out into new geographical regions, the South and the West. On the whole, however, though the Federation was not unmindful of the unskilled, still, during the fifteen years after 1898 it brought into its fold principally the upper strata of semi-skilled labor. Down to the "boom" period brought on by the World War, the Federation did not comprise to any great extent either the totally unskilled, or the partially skilled foreign-speaking workmen, with the exception of the miners and the clothing workers. In other words, those below the level of the skilled trades, which did gain admittance, were principally the same elements which had asserted their claim to organization during the stormy period of the Knights of Labor.[49] The new accretions to the American wage-earning class since the eighties, the East and South Europeans, on the one hand, and the ever-growing contingent of "floaters" of native and North and West European stock, on the other hand, were still largely outside the organization.