TTM20172016201520142013
Gross margin24.1%24.1%24.4%23.6%22.0%22.1%
Gross margin growth (bps)-38-2972161-117
Operating margin3.3%3.2%3.4%3.7%3.2%3.4%
Operating margin growth (bps)-11-19-2947-143
Net profit margin2.1%1.3%1.4%1.6%1.3%0.6%
Net profit margin growth (bps)67-8-142378-61