TTM20172016201520142013
Gross margin30.4%30.4%29.6%30.4%30.0%30.7%
Gross margin growth (bps)7979-7535-41-143
Operating margin4.2%4.2%3.4%3.3%4.5%6.0%
Operating margin growth (bps)767611-119-152-72
Net profit margin2.5%2.5%2.0%1.4%2.7%3.7%
Net profit margin growth (bps)545464-135-94-146