TTM20172016201520142013
Gross margin31.2%32.0%31.8%31.6%32.1%33.1%
Gross margin growth (bps)-1432519-48-10490
Operating margin0.2%1.6%2.9%2.6%2.6%4.8%
Operating margin growth (bps)-361-127310-220201
Net profit margin-0.9%0.1%1.7%1.5%1.5%2.8%
Net profit margin growth (bps)-317-15417-3-129123