TTM20172016201520142013
Gross margin36.2%36.2%36.2%36.8%37.0%36.6%
Gross margin growth (bps)-1-1-58-203526
Operating margin15.4%15.4%13.9%14.6%14.5%14.4%
Operating margin growth (bps)150150-7359-45
Net profit margin10.6%10.6%7.0%7.2%6.7%6.8%
Net profit margin growth (bps)360360-2343-7-51