TTM20152014201320122011
Gross margin34.0%34.0%33.9%34.1%34.0%33.1%
Gross margin growth (bps)1313-18118834
Operating margin5.8%5.8%5.9%5.5%7.6%7.5%
Operating margin growth (bps)-7-739-21216328
Net profit margin3.5%3.5%3.6%3.4%4.8%4.6%
Net profit margin growth (bps)-7-723-14619229