TTM20172016201520142013
Gross margin51.8%48.5%48.4%47.7%47.7%47.2%
Gross margin growth (bps)39810674747N/A
Operating margin6.5%4.0%7.0%8.1%8.1%13.6%
Operating margin growth (bps)271-304-102-549-549194
Net profit margin0.2%-1.6%1.9%3.9%3.9%7.8%
Net profit margin growth (bps)172-351-203-389-389175