TTM20172016201520142013
Gross margin43.6%43.6%44.1%43.4%41.7%41.5%
Gross margin growth (bps)-52-52671702414
Operating margin4.2%3.9%3.7%3.4%3.1%3.5%
Operating margin growth (bps)62193422-3715
Net profit margin3.9%3.7%3.1%1.8%2.0%1.7%
Net profit margin growth (bps)17755133-2236-82