TTM20162015201420132012
Gross margin29.9%28.4%27.9%27.1%28.1%27.4%
Gross margin growth (bps)2015482-11075423
Operating margin-0.8%-1.7%-0.9%-1.7%0.3%0.2%
Operating margin growth (bps)-21-8084-2029395
Net profit margin-1.0%-1.9%-1.1%-1.8%0.3%0.2%
Net profit margin growth (bps)-22-8077-2084429