Q2 2018Q1 2018Q4 2017Q3 2017Q2 2017
Gross margin23.3%22.6%24.2%23.4%23.9%
Gross margin growth (bps)-60-54-47-114-121
Operating margin0.6%-0.1%1.6%1.4%1.6%
Operating margin growth (bps)-99-125-88-128-80
Net profit margin2.2%-1.0%-0.2%0.2%0.2%
Net profit margin growth (bps)204-91-104-54-10