TTM20162015201420132012
Gross margin28.3%28.6%29.2%29.1%29.2%29.4%
Gross margin growth (bps)-66-555-10-2520
Operating margin2.3%2.9%4.6%4.7%4.4%3.6%
Operating margin growth (bps)-160-169-7228776
Net profit margin1.3%1.6%2.6%2.6%2.5%2.0%
Net profit margin growth (bps)-94-971144765