TTM20162015201420132012
Gross margin30.6%30.8%31.0%30.7%31.1%31.7%
Gross margin growth (bps)-22-1127-37-691
Operating margin8.8%9.4%9.5%9.4%9.9%10.3%
Operating margin growth (bps)-54-1417-56-4126
Net profit margin5.3%5.7%5.7%5.6%5.9%5.9%
Net profit margin growth (bps)-39-39-22-977