TTM20172016201520142013
Gross margin34.4%34.3%34.3%34.4%34.1%34.0%
Gross margin growth (bps)244-12271938
Operating margin9.3%9.5%10.2%10.4%10.3%10.0%
Operating margin growth (bps)-64-78-21133660
Net profit margin5.9%5.8%6.4%6.6%6.5%6.4%
Net profit margin growth (bps)-37-62-14101443