TTM20172016201520142013
Gross margin26.9%26.7%27.8%27.3%27.1%27.7%
Gross margin growth (bps)-20-1084623-5720
Operating margin2.5%2.2%3.1%3.2%3.0%4.1%
Operating margin growth (bps)22-93-218-115-57
Net profit margin3.2%2.8%2.8%2.1%2.0%2.7%
Net profit margin growth (bps)1076728-68-39