TTM20142013201220112010
Gross margin43.9%42.3%42.3%41.8%39.3%38.5%
Gross margin growth (bps)-2464724780-96
Operating margin17.1%17.8%18.6%18.5%17.1%17.6%
Operating margin growth (bps)-135-8615138-52-17
Net profit margin8.5%8.9%10.1%9.9%9.1%8.8%
Net profit margin growth (bps)-145-12320763019