TTM20172016201520142013
Gross margin33.4%33.4%32.9%33.4%35.4%36.1%
Gross margin growth (bps)5353-52-197-769
Operating margin5.3%5.3%4.8%5.7%8.8%10.1%
Operating margin growth (bps)5151-99-308-124-18
Net profit margin2.9%2.9%3.1%3.6%5.3%6.3%
Net profit margin growth (bps)-21-21-48-174-1024