TTM20172016201520142013
Gross margin28.4%29.7%30.9%32.5%32.7%33.7%
Gross margin growth (bps)-215-117-156-29-92-59
Operating margin1.1%2.9%2.4%7.7%7.7%8.3%
Operating margin growth (bps)-5657-5310-59-252
Net profit margin-2.1%-1.0%1.2%4.7%4.7%5.0%
Net profit margin growth (bps)-289-220-347-6-30-119