Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 43.7% | 43.6% | 44.5% | 45.4% | 45.2% | 50.1% |
| Gross margin growth (bps) | -39 | -90 | -94 | 18 | -484 | 15 |
| Operating margin | 6.3% | 6.1% | 8.2% | 8.5% | 8.7% | 10.2% |
| Operating margin growth (bps) | -106 | -215 | -25 | -17 | -152 | -42 |
| Net profit margin | 5.4% | 5.1% | 4.8% | 4.9% | 5.0% | 6.0% |
| Net profit margin growth (bps) | 108 | 27 | -6 | -15 | -102 | -21 |