TTM20182017201620152014
Gross margin28.9%28.9%29.7%30.9%32.5%32.7%
Gross margin growth (bps)-80-80-117-156-29-92
Operating margin0.5%0.5%2.9%2.4%7.7%7.7%
Operating margin growth (bps)-245-24557-5310-59
Net profit margin0.8%0.8%-1.0%1.2%4.7%4.7%
Net profit margin growth (bps)177177-220-347-6-30