TTM20172016201520142013
Gross margin48.5%48.5%48.4%47.7%47.7%47.2%
Gross margin growth (bps)1010674747N/A
Operating margin4.0%4.0%7.0%8.1%8.1%13.6%
Operating margin growth (bps)-304-304-102-549-549194
Net profit margin-1.6%-1.6%1.9%3.9%3.9%7.8%
Net profit margin growth (bps)-351-351-203-389-389175