In this Thursday, Sept. 27, 2012, file photo, Millie Brown, a cook and waitress at Buch's truck stop, serves a breakfast, in Steubenville, Ohio. U.S. service companies, which employ nearly 90 percent of the work force, grew in September at the fastest pace since March. The growth was driven by sharp increases in current and future sales. The Institute for Supply Management said Wednesday, Oct. 3, 2012, that its index of non-manufacturing activity rose to 55.1, up from 53.7 in August. (AP Photo/Keith Srakocic, File)