TTM20172016201520142013
Gross margin44.5%45.0%46.4%48.1%49.0%48.7%
Gross margin growth (bps)-135-145-165-952982
Operating margin-2.1%0.6%8.7%10.3%11.5%11.4%
Operating margin growth (bps)-946-809-166-11711-1
Net profit margin-2.3%-1.0%4.1%5.9%6.7%7.0%
Net profit margin growth (bps)-668-507-177-88-22-6