TTM20172016201520142013
Gross margin36.8%36.8%37.3%36.2%37.5%38.6%
Gross margin growth (bps)-42-42110-139-10525
Operating margin11.9%11.9%10.7%10.1%13.6%14.1%
Operating margin growth (bps)11711769-350-5254
Net profit margin8.3%8.3%7.1%6.6%8.7%9.0%
Net profit margin growth (bps)11511550-210-2938