Q2 2015Q1 2015Q4 2014Q3 2014Q2 2014
Gross margin31.1%30.1%25.8%27.5%28.4%
Gross margin growth (bps)268329-7883-187
Operating margin1.8%-1.5%3.0%-0.2%2.7%
Operating margin growth (bps)-92-21-205114-7
Net profit margin1.2%-0.8%2.8%-0.3%2.7%
Net profit margin growth (bps)-15343-218107-4