TTM20152014201320122011
Gross margin49.9%48.4%50.9%52.8%55.7%56.9%
Gross margin growth (bps)122-247-193-287-122139
Operating margin17.3%17.9%20.9%24.6%27.5%28.7%
Operating margin growth (bps)-108-301-367-287-120333
Net profit margin12.6%12.9%13.3%17.6%19.7%18.4%
Net profit margin growth (bps)-64-39-427-218135127