TTM20162015201420132012
Gross margin30.6%30.8%31.0%30.7%31.1%31.7%
Gross margin growth (bps)-35-1127-37-691
Operating margin9.0%9.4%9.5%9.4%9.9%10.3%
Operating margin growth (bps)-68-1417-56-4126
Net profit margin5.4%5.7%5.7%5.6%5.9%5.9%
Net profit margin growth (bps)-48-39-22-977