TTM20172016201520142013
Gross margin43.2%43.0%42.7%43.8%43.7%45.0%
Gross margin growth (bps)2630-11115-134345
Operating margin6.8%6.4%6.2%5.8%5.1%5.5%
Operating margin growth (bps)14213671-37-383
Net profit margin4.8%4.4%3.9%3.8%3.8%4.0%
Net profit margin growth (bps)2947131-28-282