TTM20172016201520142013
Gross margin84.1%82.0%72.1%65.3%58.4%49.9%
Gross margin growth (bps)966987678754844120
Operating margin6.8%7.5%7.6%7.4%5.1%8.4%
Operating margin growth (bps)-79-415223-324-415
Net profit margin8.3%8.6%4.3%4.3%2.9%5.4%
Net profit margin growth (bps)3874307137-253-242