TTM20172016201520142013
Gross margin22.8%22.8%20.7%24.7%27.5%26.4%
Gross margin growth (bps)217217-405-274108-156
Operating margin-2.7%-2.7%-4.0%0.5%2.3%1.8%
Operating margin growth (bps)134134-456-17850-204
Net profit margin-2.3%-2.3%-2.6%0.2%1.9%1.0%
Net profit margin growth (bps)2828-286-16586-130