TTM20152014201320122011
Gross margin59.4%59.7%58.0%57.5%57.3%57.3%
Gross margin growth (bps)9316552194-58
Operating margin16.0%17.7%17.7%18.5%18.0%18.3%
Operating margin growth (bps)-146-3-7549-33224
Net profit margin10.8%11.5%11.0%11.7%9.2%5.0%
Net profit margin growth (bps)-3750-67244420499