TTM20162015201420132012
Gross margin33.5%33.7%33.7%32.6%32.2%30.9%
Gross margin growth (bps)-17011439136-26
Operating margin6.9%7.8%8.4%6.8%9.3%10.1%
Operating margin growth (bps)-140-61159-253-81308
Net profit margin3.2%3.8%3.9%2.1%3.4%5.3%
Net profit margin growth (bps)-91-13184-129-195-362