TTM20172016201520142013
Gross margin53.3%53.3%53.3%52.8%53.5%55.0%
Gross margin growth (bps)6646-72-14421
Operating margin9.8%9.8%11.8%12.2%11.9%9.8%
Operating margin growth (bps)-202-202-3930212259
Net profit margin6.3%6.3%7.6%8.8%8.9%11.3%
Net profit margin growth (bps)-123-124-124-10-237446