TTM20172016201520142013
Gross margin54.2%54.3%54.0%53.5%53.7%53.8%
Gross margin growth (bps)-223144-14-15128
Operating margin5.2%5.5%5.8%5.7%3.4%7.1%
Operating margin growth (bps)-98-3214231-372363
Net profit margin2.6%2.6%3.5%3.5%1.1%4.3%
Net profit margin growth (bps)-106-891233-321210