[["", "2014", "2013", "2012"], ["net sales", "$ 8065", "$ 7958", "$ 8347"], ["operating profit", "1039", "1045", "1083"], ["operating margins", "12.9% ( 12.9 % )", "13.1% ( 13.1 % )", "13.0% ( 13.0 % )"], ["backlog at year-end", "$ 18900", "$ 20500", "$ 18100"]]