TTM20172016201520142013
Gross margin27.2%27.2%27.2%27.3%26.9%26.9%
Gross margin growth (bps)-50-1345-4-40
Operating margin2.2%2.5%2.7%2.7%2.0%3.0%
Operating margin growth (bps)-42-17-478-103-91
Net profit margin1.6%1.4%1.5%1.9%0.3%1.7%
Net profit margin growth (bps)10-10-40160-141-46