TTM20162015201420132012
Gross margin36.5%36.5%38.4%38.6%37.3%37.7%
Gross margin growth (bps)-198-198-15132-425
Operating margin4.4%4.4%9.4%8.9%8.8%10.1%
Operating margin growth (bps)-504-5045111-128-26
Net profit margin4.9%4.9%6.6%6.1%5.9%6.5%
Net profit margin growth (bps)-168-1684823-63-43