TTM20162015201420132012
Gross margin33.7%36.5%38.4%38.6%37.3%37.7%
Gross margin growth (bps)-470-198-15132-425
Operating margin-0.0%4.4%9.4%8.9%8.8%10.1%
Operating margin growth (bps)-937-5045111-128-26
Net profit margin1.9%4.9%6.6%6.1%5.9%6.5%
Net profit margin growth (bps)-525-1684823-63-43