TTM20172016201520142013
Gross margin36.5%37.8%37.3%37.1%36.8%37.0%
Gross margin growth (bps)-148482224-207
Operating margin-26.8%-24.8%-7.2%-5.8%5.9%5.4%
Operating margin growth (bps)-2,086-1,759-135-1,17150-184
Net profit margin-23.0%-21.6%-7.4%-6.5%3.6%2.0%
Net profit margin growth (bps)-1,614-1,418-95-1,003157-146