TTM20162015201420132012
Gross margin29.1%28.4%27.9%27.1%28.1%27.4%
Gross margin growth (bps)1465482-11075423
Operating margin-1.5%-1.7%-0.9%-1.7%0.3%0.2%
Operating margin growth (bps)-52-8084-2029395
Net profit margin-1.7%-1.9%-1.1%-1.8%0.3%0.2%
Net profit margin growth (bps)-55-8077-2084429