Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 62.1% | 62.1% | 61.7% | 60.7% | 61.4% | 60.7% |
| Gross margin growth (bps) | 41 | 41 | 102 | -65 | 69 | -17 |
| Operating margin | 13.1% | 13.1% | 14.5% | 14.8% | 13.8% | 15.5% |
| Operating margin growth (bps) | -135 | -138 | -34 | 101 | -167 | -3 |
| Net profit margin | 8.8% | 8.8% | 8.8% | 7.6% | 7.3% | 5.5% |
| Net profit margin growth (bps) | 9 | 9 | 120 | 27 | 180 | -130 |