TTM20172016201520142013
Gross margin30.8%32.0%31.8%31.6%32.1%33.1%
Gross margin growth (bps)-1852519-48-10490
Operating margin-0.3%1.6%2.9%2.6%2.6%4.8%
Operating margin growth (bps)-386-127310-220201
Net profit margin-1.2%0.1%1.7%1.5%1.5%2.8%
Net profit margin growth (bps)-326-15417-3-129123