TTM20172016201520142013
Gross margin27.2%27.2%27.2%27.3%26.9%26.9%
Gross margin growth (bps)00-1345-4-40
Operating margin2.5%2.5%2.7%2.7%2.0%3.0%
Operating margin growth (bps)-17-17-478-103-91
Net profit margin1.4%1.4%1.5%1.9%0.3%1.7%
Net profit margin growth (bps)-10-10-40160-141-46