TTM20172016201520142013
Gross margin37.8%37.4%37.3%35.6%35.1%36.7%
Gross margin growth (bps)34716848-157-43
Operating margin11.3%11.0%12.1%12.2%12.6%15.5%
Operating margin growth (bps)-44-111-13-34-29592
Net profit margin8.8%7.6%8.6%8.0%8.4%10.0%
Net profit margin growth (bps)80-10160-34-16630