TTM20172016201520142013
Gross margin28.8%28.8%30.2%33.8%30.5%32.3%
Gross margin growth (bps)-147-147-359332-182-208
Operating margin1.4%1.4%4.7%8.8%6.3%9.7%
Operating margin growth (bps)-333-333-409251-335-201
Net profit margin0.9%0.9%2.6%5.0%3.2%5.3%
Net profit margin growth (bps)-171-171-234180-210-120