TTM20172016201520142013
Gross margin28.2%27.3%28.5%29.3%30.2%31.2%
Gross margin growth (bps)-27-112-86-92-96-89
Operating margin4.5%4.3%7.4%8.2%9.7%10.2%
Operating margin growth (bps)-255-305-77-155-49-30
Net profit margin2.4%2.3%4.6%5.2%6.1%6.4%
Net profit margin growth (bps)-219-226-60-95-25-10