TTM20172016201520142013
Gross margin38.2%38.1%37.3%40.8%42.7%44.2%
Gross margin growth (bps)15788-352-194-150106
Operating margin2.9%3.0%4.0%6.8%9.8%11.5%
Operating margin growth (bps)70-97-278-304-174157
Net profit margin1.6%1.6%2.1%4.0%6.0%7.5%
Net profit margin growth (bps)56-45-189-201-151-337