TTM20172016201520142013
Gross margin39.2%39.0%39.4%39.1%40.0%40.1%
Gross margin growth (bps)-1-4132-92-12-15
Operating margin7.3%7.3%5.1%7.5%10.0%9.6%
Operating margin growth (bps)232217-243-24337-2
Net profit margin6.4%6.2%2.4%4.0%5.4%5.3%
Net profit margin growth (bps)415383-156-1471150