TTM20172016201520142013
Gross margin33.3%34.6%35.7%36.0%34.8%29.4%
Gross margin growth (bps)-130-103-37128532-187
Operating margin1.1%0.9%3.1%-0.7%-2.5%-12.0%
Operating margin growth (bps)-162-222385181946-189
Net profit margin-0.4%-0.9%0.0%-4.1%-6.3%-11.7%
Net profit margin growth (bps)55-94407223541-412