TTM20172016201520142013
Gross margin14.3%14.4%14.2%14.6%14.6%14.7%
Gross margin growth (bps)124-39-4-9-11
Operating margin4.3%4.5%4.7%5.2%5.4%5.6%
Operating margin growth (bps)-37-16-52-21-929
Net profit margin2.9%3.0%3.1%3.2%3.7%3.7%
Net profit margin growth (bps)-14-3-13-51336