TTM20182017201620152014
Gross margin43.5%44.0%44.5%44.6%43.8%43.1%
Gross margin growth (bps)-122-50-27475-59
Operating margin1.2%2.4%2.5%2.0%-0.6%-3.5%
Operating margin growth (bps)-176-347264282-350
Net profit margin1.1%2.0%2.1%2.9%-0.4%-3.6%
Net profit margin growth (bps)-130-3-82327318-406