TTM20182017201620152014
Gross margin10.2%10.2%12.8%13.0%12.9%13.1%
Gross margin growth (bps)-253-253-2513-23151
Operating margin1.2%1.4%1.8%2.1%1.4%1.5%
Operating margin growth (bps)-47-42-3571-7371
Net profit margin0.3%0.3%6.0%1.6%1.7%1.6%
Net profit margin growth (bps)-564-564438-951,464