TTM20172016201520142013
Gross margin28.9%28.9%29.2%29.3%29.8%29.7%
Gross margin growth (bps)-27-27-6-56820
Operating margin4.8%4.8%5.3%6.4%6.7%5.7%
Operating margin growth (bps)-42-42-110-36101178
Net profit margin3.4%3.4%3.1%3.6%3.6%2.1%
Net profit margin growth (bps)3232-52-4152102