TTM20172016201520142013
Gross margin36.7%36.1%37.9%37.0%35.2%33.7%
Gross margin growth (bps)-3-17688182147-630
Operating margin8.9%8.0%9.2%9.1%4.7%4.3%
Operating margin growth (bps)122-1211043448-709
Net profit margin6.5%5.4%5.9%6.2%2.4%2.5%
Net profit margin growth (bps)163-51-31375-6-417