TTM20172016201520142013
Gross margin36.6%34.8%31.8%35.7%37.0%35.9%
Gross margin growth (bps)434295-385-130109-68
Operating margin7.3%5.4%2.5%8.8%8.9%3.5%
Operating margin growth (bps)412290-631-8534932
Net profit margin1.4%0.1%0.3%4.3%4.9%1.2%
Net profit margin growth (bps)69-16-407-55370225