TTM20172016201520142013
Gross margin53.0%52.7%52.7%52.3%52.1%51.8%
Gross margin growth (bps)26-244212532
Operating margin17.2%19.1%19.4%19.2%19.3%19.4%
Operating margin growth (bps)-211-2720-14-745
Net profit margin12.3%11.8%11.7%11.4%11.3%11.1%
Net profit margin growth (bps)45928101830