TTM20172016201520142013
Gross margin29.1%29.0%29.9%30.0%30.6%31.3%
Gross margin growth (bps)-53-89-16-60-67-19
Operating margin5.5%5.6%5.7%7.4%8.1%8.6%
Operating margin growth (bps)-7-12-168-77-51-33
Net profit margin3.8%3.8%3.6%4.5%5.1%5.4%
Net profit margin growth (bps)814-92-51-3845