TTM20172016201520142013
Gross margin37.6%37.0%35.5%34.0%33.2%32.7%
Gross margin growth (bps)891521428548-30
Operating margin4.1%2.6%0.7%2.6%-2.1%3.7%
Operating margin growth (bps)470187-183470-587-190
Net profit margin3.0%1.7%-0.8%-4.2%-2.5%1.5%
Net profit margin growth (bps)445250337-168-402-108