TTM20172016201520142013
Gross margin32.8%32.9%33.4%34.0%35.5%35.3%
Gross margin growth (bps)-79-48-62-14313-25
Operating margin4.2%4.2%5.0%6.8%8.3%8.2%
Operating margin growth (bps)-57-76-178-1581524
Net profit margin3.6%3.4%2.6%4.0%4.9%4.8%
Net profit margin growth (bps)11581-135-916-14