TTM20172016201520142013
Gross margin43.8%43.8%46.9%47.7%47.0%51.7%
Gross margin growth (bps)-309-309-8069-469-175
Operating margin6.4%6.4%13.9%14.2%14.0%21.8%
Operating margin growth (bps)-759-759-2420-784-447
Net profit margin3.3%3.3%8.6%8.7%8.5%13.2%
Net profit margin growth (bps)-532-532-618-467-270