TTM20172016201520142013
Gross margin29.7%29.6%30.4%28.7%27.7%29.1%
Gross margin growth (bps)-44-8417499-143-104
Operating margin1.7%1.5%0.1%-0.7%-2.1%-5.8%
Operating margin growth (bps)15414083138371598
Net profit margin8.1%7.9%0.2%-0.4%-2.4%-6.1%
Net profit margin growth (bps)83176868199371570