TTM20172016201520142013
Gross margin21.6%22.4%22.7%18.5%15.7%14.9%
Gross margin growth (bps)-144-264122798256
Operating margin3.5%4.1%5.5%4.2%3.1%2.9%
Operating margin growth (bps)-113-13113010324-23
Net profit margin4.0%2.4%3.2%2.3%1.7%1.5%
Net profit margin growth (bps)135-81856119-15