TTM20172016201520142013
Gross margin14.2%14.4%14.2%14.6%14.6%14.7%
Gross margin growth (bps)-1524-39-4-9-11
Operating margin4.2%4.5%4.7%5.2%5.4%5.6%
Operating margin growth (bps)-49-16-52-21-929
Net profit margin2.5%3.0%3.1%3.2%3.7%3.7%
Net profit margin growth (bps)-64-3-13-51336