TTM20182017201620152014
Gross margin54.7%54.3%54.9%56.2%60.4%60.7%
Gross margin growth (bps)31-53-137-415-155-216
Operating margin-2.1%-2.9%0.1%-1.9%1.3%-1.0%
Operating margin growth (bps)-205-297199-322101-402
Net profit margin-1.3%-1.7%1.1%-2.6%1.4%1.1%
Net profit margin growth (bps)-247-284378-40630-151