TTM20172016201520142013
Gross margin14.7%14.7%14.5%15.1%14.9%14.8%
Gross margin growth (bps)2424-58161618
Operating margin-2.8%-2.8%1.1%2.4%2.5%2.7%
Operating margin growth (bps)-387-387-131-12-19180
Net profit margin-3.0%-3.0%0.3%1.0%0.9%0.3%
Net profit margin growth (bps)-333-334-673689