TTM20172016201520142013
Gross margin27.3%27.5%27.3%27.5%27.2%27.6%
Gross margin growth (bps)1425-2626-354
Operating margin8.0%7.9%8.0%8.2%7.8%8.0%
Operating margin growth (bps)40-12-1842-1614
Net profit margin7.1%6.6%5.9%6.0%5.6%5.7%
Net profit margin growth (bps)12672-1139-47