TTM20162015201420132012
Gross margin28.7%28.7%28.2%28.1%28.0%27.9%
Gross margin growth (bps)5454661737
Operating margin14.0%14.0%13.6%13.5%13.1%13.1%
Operating margin growth (bps)41411335573
Net profit margin8.7%8.7%8.5%8.4%8.2%8.1%
Net profit margin growth (bps)14141719946