TTM20162015201420132012
Gross margin36.8%37.3%38.9%40.0%39.3%37.6%
Gross margin growth (bps)-172-168-10371165-171
Operating margin2.2%2.9%4.7%5.6%5.2%4.8%
Operating margin growth (bps)-191-180-984341-229
Net profit margin1.5%1.9%2.9%3.5%3.2%3.1%
Net profit margin growth (bps)-115-109-56358-137