TTM20152014201320122011
Gross margin32.5%32.6%32.6%33.4%33.5%33.0%
Gross margin growth (bps)-112-80-94690
Operating margin5.9%6.6%7.1%8.6%8.1%7.0%
Operating margin growth (bps)-92-54-14546113260
Net profit margin3.2%3.6%3.9%4.8%5.0%3.6%
Net profit margin growth (bps)-51-37-83-19132163