TTM20172016201520142013
Gross margin43.7%43.6%44.5%45.4%45.2%50.1%
Gross margin growth (bps)-39-90-9418-48415
Operating margin6.3%6.1%8.2%8.5%8.7%10.2%
Operating margin growth (bps)-106-215-25-17-152-42
Net profit margin5.4%5.1%4.8%4.9%5.0%6.0%
Net profit margin growth (bps)10827-6-15-102-21