TTM20172016201520142013
Gross margin28.9%28.9%29.7%29.5%29.4%29.8%
Gross margin growth (bps)-80-801514-417
Operating margin6.0%6.0%7.2%7.5%6.2%7.3%
Operating margin growth (bps)-115-115-34125-101-58
Net profit margin4.1%4.1%3.9%4.6%-2.3%2.8%
Net profit margin growth (bps)1414-62681-502-133