TTM20172016201520142013
Gross margin38.3%38.5%39.1%40.1%38.6%37.6%
Gross margin growth (bps)-12-61-9814796-625
Operating margin26.7%26.8%27.8%30.5%28.7%28.7%
Operating margin growth (bps)-21-107-2641755-663
Net profit margin21.5%21.1%21.2%22.8%21.6%21.7%
Net profit margin growth (bps)81-9-166123-6-499