TTM20162015201420132012
Gross margin30.8%30.8%31.0%30.7%31.1%31.7%
Gross margin growth (bps)-23-1127-37-691
Operating margin9.2%9.4%9.5%9.4%9.9%10.3%
Operating margin growth (bps)-41-1417-56-4126
Net profit margin5.5%5.7%5.7%5.6%5.9%5.9%
Net profit margin growth (bps)-29-39-22-977