Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 36.5% | 37.8% | 37.3% | 37.1% | 36.8% | 37.0% |
| Gross margin growth (bps) | -148 | 48 | 22 | 24 | -20 | 7 |
| Operating margin | -26.8% | -24.8% | -7.2% | -5.8% | 5.9% | 5.4% |
| Operating margin growth (bps) | -2,086 | -1,759 | -135 | -1,171 | 50 | -184 |
| Net profit margin | -23.0% | -21.6% | -7.4% | -6.5% | 3.6% | 2.0% |
| Net profit margin growth (bps) | -1,614 | -1,418 | -95 | -1,003 | 157 | -146 |