Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 54.9% | 54.9% | 56.5% | 57.5% | 57.9% | 59.8% |
| Gross margin growth (bps) | -166 | -166 | -91 | -40 | -199 | 155 |
| Operating margin | -1.4% | -1.4% | 7.9% | 13.6% | 15.2% | 16.2% |
| Operating margin growth (bps) | -929 | -928 | -572 | -159 | -106 | 107 |
| Net profit margin | -1.5% | -1.5% | 5.3% | 9.2% | 10.4% | 10.8% |
| Net profit margin growth (bps) | -684 | -684 | -386 | -120 | -38 | 87 |