TTM20172016201520142013
Gross margin21.8%22.8%20.7%24.7%27.5%26.4%
Gross margin growth (bps)118217-405-274108-156
Operating margin-3.2%-2.7%-4.0%0.5%2.3%1.8%
Operating margin growth (bps)152134-456-17850-204
Net profit margin-3.7%-2.3%-2.6%0.2%1.9%1.0%
Net profit margin growth (bps)-4728-286-16586-130