TTM20182017201620152014
Gross margin9.1%10.2%12.8%13.0%12.9%13.1%
Gross margin growth (bps)-268-253-2513-23151
Operating margin0.3%1.4%1.8%2.1%1.4%1.5%
Operating margin growth (bps)-74-42-3571-7371
Net profit margin-0.1%0.3%6.0%1.6%1.7%1.6%
Net profit margin growth (bps)-473-564438-951,464