TTM20172016201520142013
Gross margin30.8%31.1%31.9%33.2%30.6%25.1%
Gross margin growth (bps)-92-75-131256549-310
Operating margin1.0%1.4%0.4%2.1%-0.8%-5.6%
Operating margin growth (bps)37104-175290482-329
Net profit margin0.4%0.6%-0.6%0.9%-1.0%-3.1%
Net profit margin growth (bps)6115-144187209-191