TTM20172016201520142013
Gross margin14.9%14.7%14.5%15.1%14.9%14.8%
Gross margin growth (bps)4824-58161618
Operating margin-2.7%-2.8%1.1%2.4%2.5%2.7%
Operating margin growth (bps)-365-387-131-12-19180
Net profit margin-3.0%-3.0%0.3%1.0%0.9%0.3%
Net profit margin growth (bps)-325-334-673689