TTM20162015201420132012
Gross margin29.3%29.7%29.5%29.4%29.8%29.7%
Gross margin growth (bps)-571514-417-37
Operating margin6.5%7.2%7.5%6.2%7.3%7.8%
Operating margin growth (bps)-176-34125-101-5821
Net profit margin3.8%3.9%4.6%-2.3%2.8%4.1%
Net profit margin growth (bps)-95-62681-502-133-10