TTM20162015201420132012
Gross margin24.3%24.4%23.6%22.0%22.1%22.1%
Gross margin growth (bps)3372161-117-17
Operating margin3.1%3.4%3.7%3.2%3.4%3.3%
Operating margin growth (bps)-37-2947-1431
Net profit margin1.3%1.4%1.6%1.3%0.6%1.2%
Net profit margin growth (bps)-22-142378-617