TTM20172016201520142013
Gross margin36.2%36.1%37.9%37.0%35.2%33.7%
Gross margin growth (bps)-108-17688182147-630
Operating margin8.2%8.0%9.2%9.1%4.7%4.3%
Operating margin growth (bps)-34-1211043448-709
Net profit margin5.7%5.4%5.9%6.2%2.4%2.5%
Net profit margin growth (bps)23-51-31375-6-417