TTM20162015201420132012
Gross margin59.4%57.7%56.3%55.6%54.6%54.0%
Gross margin growth (bps)1991406510463-50
Operating margin9.2%8.7%12.0%9.4%10.5%14.8%
Operating margin growth (bps)-310-333258-110-434455
Net profit margin4.3%5.3%9.8%6.2%7.1%11.0%
Net profit margin growth (bps)-451-452362-96-389609