TTM20162015201420132012
Gross margin36.7%37.0%37.1%38.3%38.8%39.4%
Gross margin growth (bps)0-2-126-52-5516
Operating margin9.1%9.3%9.8%10.7%10.3%10.1%
Operating margin growth (bps)-36-52-873918-14
Net profit margin5.9%6.0%6.2%6.6%6.4%6.4%
Net profit margin growth (bps)1-22-34221-2