TTM20162015201420132012
Gross margin37.5%37.3%35.6%35.1%36.7%37.1%
Gross margin growth (bps)16616848-157-43-23
Operating margin11.8%12.1%12.2%12.6%15.5%14.6%
Operating margin growth (bps)-33-13-34-29592-129
Net profit margin8.2%8.6%8.0%8.4%10.0%9.7%
Net profit margin growth (bps)-1160-34-16630-30