TTM20162015201420132012
Gross margin44.2%44.1%43.4%41.7%41.5%41.4%
Gross margin growth (bps)13671702414-24
Operating margin3.8%3.7%3.4%3.1%3.5%3.4%
Operating margin growth (bps)193422-3715122
Net profit margin2.3%3.1%1.8%2.0%1.7%2.5%
Net profit margin growth (bps)-81133-2236-82163