Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 38.4% | 38.3% | 36.3% | 36.2% | 38.3% | 39.0% |
| Gross margin growth (bps) | 110 | 191 | 14 | -206 | -70 | -46 |
| Operating margin | 8.5% | 9.3% | 7.7% | 9.6% | 12.7% | 13.3% |
| Operating margin growth (bps) | -52 | 165 | -197 | -303 | -63 | 90 |
| Net profit margin | 5.4% | 5.3% | 4.4% | 5.8% | 7.7% | 7.9% |
| Net profit margin growth (bps) | 1 | 99 | -147 | -185 | -25 | 67 |