TTM20172016201520142013
Gross margin53.2%52.3%51.2%50.5%49.4%50.2%
Gross margin growth (bps)24211067108-81250
Operating margin10.4%9.5%10.2%9.6%6.6%9.9%
Operating margin growth (bps)48-6356299-334270
Net profit margin4.0%5.7%6.4%4.7%2.2%4.9%
Net profit margin growth (bps)-224-65173243-266178