TTM20172016201520142013
Gross margin32.7%32.7%34.1%36.0%37.2%36.5%
Gross margin growth (bps)-134-134-197-11363155
Operating margin1.5%1.5%2.9%4.7%5.6%5.2%
Operating margin growth (bps)-139-139-180-984341
Net profit margin0.8%0.8%1.9%2.9%3.5%3.2%
Net profit margin growth (bps)-102-102-109-56358