TTM20162015201420132012
Gross margin40.4%40.4%39.8%39.5%39.2%39.4%
Gross margin growth (bps)54543431-25-72
Operating margin4.8%4.8%4.5%4.3%4.5%6.0%
Operating margin growth (bps)232321-15-149-104
Net profit margin2.9%2.9%2.8%2.2%2.4%3.3%
Net profit margin growth (bps)191955-24-94-71