TTM20172016201520142013
Gross margin31.0%31.2%33.1%33.1%33.3%34.7%
Gross margin growth (bps)-253-322-1-25-140-29
Operating margin-24.2%-22.9%3.5%7.0%8.5%10.1%
Operating margin growth (bps)-2,720-2,660-349-144-168-31
Net profit margin-23.2%-22.0%1.9%4.2%5.0%6.1%
Net profit margin growth (bps)-2,471-2,401-226-85-107-28