TTM20172016201520142013
Gross margin37.5%37.0%35.5%34.0%33.2%32.7%
Gross margin growth (bps)981521428548-30
Operating margin2.9%2.6%0.7%2.6%-2.1%3.7%
Operating margin growth (bps)230187-183470-587-190
Net profit margin2.1%1.7%-0.8%-4.2%-2.5%1.5%
Net profit margin growth (bps)261250337-168-402-108