TTM20172016201520142013
Gross margin30.4%31.1%31.9%33.2%30.6%25.1%
Gross margin growth (bps)-86-75-131256549-310
Operating margin-3.4%1.4%0.4%2.1%-0.8%-5.6%
Operating margin growth (bps)-392104-175290482-329
Net profit margin-3.2%0.6%-0.6%0.9%-1.0%-3.1%
Net profit margin growth (bps)-331115-144187209-191