TTM20172016201520142013
Gross margin58.4%58.0%58.1%58.3%58.6%58.8%
Gross margin growth (bps)88-8-21-31-17-5
Operating margin4.6%4.0%5.0%3.1%6.0%4.1%
Operating margin growth (bps)70-103193-29318673
Net profit margin2.3%2.3%1.8%0.6%2.9%1.1%
Net profit margin growth (bps)12144121-229181111