TTM20172016201520142013
Gross margin62.3%62.3%61.6%61.4%61.3%60.8%
Gross margin growth (bps)7070241242-9
Operating margin8.6%8.6%10.6%10.2%10.2%11.2%
Operating margin growth (bps)-203-20341-4-94-52
Net profit margin3.6%3.6%5.3%4.9%3.5%5.2%
Net profit margin growth (bps)-178-17842137-16614