TTM20182017201620152014
Gross margin32.6%32.6%33.9%36.7%36.9%37.8%
Gross margin growth (bps)-125-125-283-23-84-51
Operating margin-10.6%-10.6%-6.8%14.7%16.6%17.5%
Operating margin growth (bps)-381-381-2,146-190-95-10
Net profit margin-6.1%-6.1%-11.3%8.2%9.6%10.1%
Net profit margin growth (bps)520520-1,944-146-4419