Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 39.1% | 39.7% | 39.0% | 40.1% | 40.1% | 39.9% |
| Gross margin growth (bps) | -10 | 68 | -105 | -6 | 25 | -17 |
| Operating margin | 12.4% | 13.7% | 13.8% | 14.7% | 13.2% | 13.4% |
| Operating margin growth (bps) | -125 | -5 | -91 | 144 | -14 | -6 |
| Net profit margin | 6.3% | 7.3% | 7.3% | 7.4% | 4.6% | 5.3% |
| Net profit margin growth (bps) | -97 | 1 | -11 | 280 | -74 | 78 |