TTM20172016201520142013
Gross margin29.0%28.9%29.2%29.3%29.8%29.7%
Gross margin growth (bps)20-27-6-56820
Operating margin4.7%4.8%5.3%6.4%6.7%5.7%
Operating margin growth (bps)-12-42-110-36101178
Net profit margin3.6%3.4%3.1%3.6%3.6%2.1%
Net profit margin growth (bps)6632-52-4152102