TTM20172016201520142013
Gross margin24.5%24.7%26.8%23.8%17.0%14.5%
Gross margin growth (bps)-136-20630168024493
Operating margin-0.2%-0.8%0.4%1.3%1.5%0.3%
Operating margin growth (bps)2-116-94-12119-25
Net profit margin0.5%0.2%-0.0%0.5%0.8%0.4%
Net profit margin growth (bps)8319-51-31390