TTM20172016201520142013
Gross margin62.1%62.1%61.8%61.0%61.1%62.7%
Gross margin growth (bps)343475-7-157-113
Operating margin6.4%6.4%5.8%6.2%8.8%9.4%
Operating margin growth (bps)5252-34-261-65-337
Net profit margin4.5%4.5%3.9%4.2%5.9%6.3%
Net profit margin growth (bps)5858-24-171-38-210