TTM20172016201520142013
Gross margin52.5%53.3%53.3%52.8%53.5%55.0%
Gross margin growth (bps)-112646-72-14421
Operating margin8.4%9.8%11.8%12.2%11.9%9.8%
Operating margin growth (bps)-330-202-3930212259
Net profit margin5.1%6.3%7.6%8.8%8.9%11.3%
Net profit margin growth (bps)-248-124-124-10-237446