TTM20172016201520142013
Gross margin24.4%24.7%25.5%25.9%28.2%29.2%
Gross margin growth (bps)-80-79-41-237-10185
Operating margin4.5%4.7%5.1%4.5%5.5%5.5%
Operating margin growth (bps)-59-4160-98362
Net profit margin3.2%3.4%3.6%4.1%2.5%3.4%
Net profit margin growth (bps)-32-11-52155-8642