Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 47.0% | 46.4% | 44.2% | 42.8% | 42.1% | 41.1% |
| Gross margin growth (bps) | 181 | 223 | 140 | 65 | 104 | 63 |
| Operating margin | 8.3% | 7.4% | 8.5% | 12.0% | 9.4% | 10.5% |
| Operating margin growth (bps) | 61 | -107 | -352 | 258 | -110 | -434 |
| Net profit margin | 5.4% | 4.5% | 5.3% | 9.8% | 6.2% | 7.1% |
| Net profit margin growth (bps) | 51 | -75 | -452 | 362 | -96 | -389 |