TTM20162015201420132012
Gross margin27.3%27.3%27.5%27.2%27.6%27.6%
Gross margin growth (bps)-24-2626-354-6
Operating margin7.8%8.0%8.2%7.8%8.0%7.8%
Operating margin growth (bps)-48-1842-1614-4
Net profit margin5.9%5.9%6.0%5.6%5.7%5.6%
Net profit margin growth (bps)-20-1139-4711