TTM20172016201520142013
Gross margin31.3%31.6%30.9%30.0%35.3%35.6%
Gross margin growth (bps)297082-522-31-29
Operating margin8.8%9.0%8.2%6.8%12.1%12.4%
Operating margin growth (bps)6476146-532-28-7
Net profit margin7.5%7.7%4.3%1.8%7.0%7.6%
Net profit margin growth (bps)316338250-514-65-76