TTM20172016201520142013
Gross margin26.4%25.1%26.4%28.3%29.3%29.1%
Gross margin growth (bps)240-129-195-10228127
Operating margin-0.6%-2.4%0.3%3.1%3.4%3.2%
Operating margin growth (bps)207-263-279-341629
Net profit margin-0.7%-1.8%0.0%1.7%2.0%2.0%
Net profit margin growth (bps)121-187-171-302-1