Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 29.4% | 29.6% | 30.4% | 28.7% | 27.7% | 29.1% |
| Gross margin growth (bps) | -33 | -84 | 174 | 99 | -143 | -104 |
| Operating margin | 1.3% | 1.5% | 0.1% | -0.7% | -2.1% | -5.8% |
| Operating margin growth (bps) | 100 | 140 | 83 | 138 | 371 | 598 |
| Net profit margin | -1.0% | 7.9% | 0.2% | -0.4% | -2.4% | -6.1% |
| Net profit margin growth (bps) | -930 | 768 | 68 | 199 | 371 | 570 |