TTM20172016201520142013
Gross margin53.5%52.8%51.2%48.4%50.9%52.8%
Gross margin growth (bps)212163278-247-193-287
Operating margin18.5%17.2%18.0%17.9%20.9%24.6%
Operating margin growth (bps)127-755-301-367-287
Net profit margin10.9%9.8%12.9%12.9%13.3%17.6%
Net profit margin growth (bps)-132-3183-39-427-218