TTM20172016201520142013
Gross margin30.3%31.2%33.1%33.1%33.3%34.7%
Gross margin growth (bps)-274-188-1-25-140-29
Operating margin-22.3%-22.9%3.5%7.0%8.5%10.1%
Operating margin growth (bps)-2,583-2,646-349-144-168-31
Net profit margin-21.4%-22.0%1.9%4.2%5.0%6.1%
Net profit margin growth (bps)-2,333-2,393-226-85-107-28