TTM20172016201520142013
Gross margin62.9%62.1%61.7%60.7%61.4%60.7%
Gross margin growth (bps)9041102-6569-17
Operating margin12.6%13.1%14.5%14.8%13.8%15.5%
Operating margin growth (bps)-61-138-34101-167-3
Net profit margin9.1%8.8%8.8%7.6%7.3%5.5%
Net profit margin growth (bps)76912027180-130