TTM20172016201520142013
Gross margin26.7%26.7%27.8%27.3%27.1%27.7%
Gross margin growth (bps)-72-1084623-5720
Operating margin2.2%2.2%3.1%3.2%3.0%4.1%
Operating margin growth (bps)-46-93-218-115-57
Net profit margin3.0%2.8%2.8%2.1%2.0%2.7%
Net profit margin growth (bps)556728-68-39