TTM20172016201520142013
Gross margin30.4%30.1%30.4%33.5%32.7%31.2%
Gross margin growth (bps)27-29-30374158158
Operating margin6.1%6.0%5.3%8.8%5.9%3.8%
Operating margin growth (bps)4469-349286212464
Net profit margin2.3%2.3%1.7%3.4%1.6%0.3%
Net profit margin growth (bps)3552-167185128326