TTM20162015201420132012
Gross margin51.3%51.9%54.3%57.0%57.1%56.2%
Gross margin growth (bps)-251-243-271-98916
Operating margin2.3%4.2%9.0%16.1%17.2%17.1%
Operating margin growth (bps)-561-484-712-10812-128
Net profit margin1.0%2.8%7.1%11.0%11.9%12.4%
Net profit margin growth (bps)-519-431-390-89-4942