TTM20172016201520142013
Gross margin28.2%29.7%30.9%32.5%32.7%33.7%
Gross margin growth (bps)-307-117-156-29-92-59
Operating margin1.0%2.9%2.4%7.7%7.7%8.3%
Operating margin growth (bps)-14757-5310-59-252
Net profit margin-0.6%-1.0%1.2%4.7%4.7%5.0%
Net profit margin growth (bps)-37-220-347-6-30-119