TTM20172016201520142013
Gross margin33.1%32.9%33.4%34.0%35.5%35.3%
Gross margin growth (bps)-2-48-62-14313-25
Operating margin4.5%4.2%5.0%6.8%8.3%8.2%
Operating margin growth (bps)41-76-178-1581524
Net profit margin3.8%3.4%2.6%4.0%4.9%4.8%
Net profit margin growth (bps)18081-135-916-14