TTM20172016201520142013
Gross margin54.1%54.9%56.2%60.4%60.7%62.8%
Gross margin growth (bps)-154-137-415-155-216-155
Operating margin-2.7%0.1%-1.9%1.3%-1.0%3.0%
Operating margin growth (bps)-203199-322101-402-302
Net profit margin-1.4%1.1%-2.6%1.4%1.1%2.6%
Net profit margin growth (bps)-78378-40630-151-203