TTM20162015201420132012
Gross margin28.8%28.9%29.5%29.1%29.3%30.1%
Gross margin growth (bps)-63-6342-20-8163
Operating margin3.4%3.8%4.7%4.5%4.9%5.7%
Operating margin growth (bps)-132-9529-48-7415
Net profit margin2.1%2.3%2.9%2.7%3.0%3.4%
Net profit margin growth (bps)-81-5721-32-39-3