TTM20162015201420132012
Gross margin54.2%54.0%53.5%53.7%53.8%52.5%
Gross margin growth (bps)6744-14-1512888
Operating margin6.1%5.8%5.7%3.4%7.1%3.5%
Operating margin growth (bps)6514231-372363265
Net profit margin3.6%3.5%3.5%1.1%4.3%2.2%
Net profit margin growth (bps)331233-321210-27