TTM20172016201520142013
Gross margin42.6%43.6%44.1%43.4%41.7%41.5%
Gross margin growth (bps)-141-52671702414
Operating margin3.6%3.9%3.7%3.4%3.1%3.5%
Operating margin growth (bps)9193422-3715
Net profit margin4.9%3.7%3.1%1.8%2.0%1.7%
Net profit margin growth (bps)28155133-2236-82