TTM20172016201520142013
Gross margin31.6%31.6%30.9%30.0%35.3%35.6%
Gross margin growth (bps)707082-522-31-29
Operating margin9.0%9.0%8.2%6.8%12.1%12.4%
Operating margin growth (bps)7676146-532-28-7
Net profit margin7.7%7.7%4.3%1.8%7.0%7.6%
Net profit margin growth (bps)338338250-514-65-76