TTM20172016201520142013
Gross margin33.4%33.2%35.7%36.0%34.9%30.9%
Gross margin growth (bps)-67-256-30110399-705
Operating margin-2.9%-3.3%0.3%1.4%-0.9%-6.7%
Operating margin growth (bps)-65-359-111229581-765
Net profit margin-2.9%-3.4%0.4%1.1%-1.2%-6.7%
Net profit margin growth (bps)-92-375-76232555-721