TTM20172016201520142013
Gross margin35.2%35.2%35.8%35.8%34.1%32.3%
Gross margin growth (bps)-54-540169182216
Operating margin3.9%3.9%7.9%7.8%7.7%7.2%
Operating margin growth (bps)-395-3958144718
Net profit margin2.2%2.2%4.9%5.2%4.5%4.1%
Net profit margin growth (bps)-270-270-3471443