TTM20172016201520142013
Gross margin35.6%36.8%37.3%36.2%37.5%38.6%
Gross margin growth (bps)-166-42110-139-10525
Operating margin10.5%11.9%10.7%10.1%13.6%14.1%
Operating margin growth (bps)-10711769-350-5254
Net profit margin7.2%8.3%7.1%6.6%8.7%9.0%
Net profit margin growth (bps)-7411550-210-2938