TTM20152014201320122011
Gross margin61.9%61.1%61.5%60.7%61.2%61.2%
Gross margin growth (bps)93-3775-484218
Operating margin0.7%8.1%5.9%9.4%10.2%7.4%
Operating margin growth (bps)196218-343-80276226
Net profit margin6.7%-0.1%-1.3%0.9%18.0%-1.6%
Net profit margin growth (bps)-30124-220-1,7131,967100