TTM20172016201520142013
Gross margin69.5%68.5%70.0%69.5%69.6%70.0%
Gross margin growth (bps)33-14550-6-49-278
Operating margin3.9%7.5%10.2%10.0%8.4%14.4%
Operating margin growth (bps)-518-26518159-602-443
Net profit margin1.2%3.1%5.7%5.4%4.1%-15.5%
Net profit margin growth (bps)-420-256341261,9631,014