TTM20172016201520142013
Gross margin28.7%28.8%29.2%29.1%29.0%29.4%
Gross margin growth (bps)-26-42718-4110
Operating margin5.6%5.8%6.9%6.5%5.7%6.7%
Operating margin growth (bps)-96-1113780-93-59
Net profit margin4.2%4.0%3.9%4.5%-2.2%2.7%
Net profit margin growth (bps)2214-62675-498-135