In this June 22, 2007, file photo, a Ford Motor Company employee watches chassis for the 2008 Ford Taurus, 2008 Ford Taurus X, and Mercury Sable roll by on the assembly line, at the Chicago Assembly Plant where they are being built. The Labor Department reported Friday, Aug. 8, 2008, that the efficiency of America's workers grew at a slightly slower pace in the spring as companies sought to produce more with leaner work forces. Workers' compensation growth slowed, too. (AP Photo/M. Spencer Green, file)