TTM20162015201420132012
Gross margin43.8%44.5%45.4%45.2%50.1%49.9%
Gross margin growth (bps)-113-9418-4841519
Operating margin6.6%8.2%8.5%8.7%10.2%10.6%
Operating margin growth (bps)-170-25-17-152-42-18
Net profit margin3.9%4.8%4.9%5.0%6.0%6.2%
Net profit margin growth (bps)-88-6-15-102-21-15