TTM20152014201320122011
Gross margin40.2%39.0%37.9%37.6%37.5%36.5%
Gross margin growth (bps)161110343102289
Operating margin-0.9%1.4%1.1%2.6%7.9%1.0%
Operating margin growth (bps)-28031-158-528690520
Net profit margin-0.9%0.8%0.5%2.1%7.4%0.4%
Net profit margin growth (bps)-22231-161-525696514