TTM20172016201520142013
Gross margin38.3%37.6%36.1%35.7%37.6%41.4%
Gross margin growth (bps)16315635-190-380-286
Operating margin2.6%-5.1%2.0%-52.7%-22.7%10.3%
Operating margin growth (bps)749-7085,470-3,001-3,297-110
Net profit margin-0.9%-5.3%-1.0%-49.6%-25.5%3.6%
Net profit margin growth (bps)546-4304,862-2,409-2,913-68