TTM20172016201520142013
Gross margin31.9%31.2%33.1%33.1%33.3%34.7%
Gross margin growth (bps)-54-322-1-25-140-29
Operating margin0.9%-22.9%3.5%7.0%8.5%10.1%
Operating margin growth (bps)2,338-2,660-349-144-168-31
Net profit margin-1.4%-22.0%1.9%4.2%5.0%6.1%
Net profit margin growth (bps)1,948-2,401-226-85-107-28