In this Dec. 6, 2010, file photo, line workers assemble a 2011 Dodge Avenger at the Chrysler Sterling Heights Assembly plant in Sterling Heights, Mich. Manufacturers produced more goods and booked more orders last month, leading to the fastest growth in factory activity since May. The Institute for Supply Management said Monday Jan. 3, 2011, that its index of manufacturing activity rose to 57 in December from 56.6 in the previous month. (AP Photo/Paul Sancya, File)
