TTM20172016201520142013
Gross margin21.8%22.0%22.4%22.2%21.2%20.6%
Gross margin growth (bps)-21-39249959-2
Operating margin1.9%1.7%3.0%3.3%2.9%2.8%
Operating margin growth (bps)-53-128-283612-9
Net profit margin3.0%1.6%1.7%1.9%1.6%1.5%
Net profit margin growth (bps)173-16-14265-1