TTM20172016201520142013
Gross margin36.3%36.2%36.2%36.8%37.0%36.6%
Gross margin growth (bps)6-1-58-203526
Operating margin16.5%15.4%13.9%14.6%14.5%14.4%
Operating margin growth (bps)230150-7359-45
Net profit margin12.0%10.6%7.0%7.2%6.7%6.8%
Net profit margin growth (bps)513360-2343-7-51