Margins
| TTM | 2015 | 2014 | 2013 | 2012 | 2011 | |
|---|---|---|---|---|---|---|
| Gross margin | 13.2% | 13.3% | 13.1% | 12.1% | 11.3% | 10.9% |
| Gross margin growth (bps) | -8 | 18 | 97 | 79 | 38 | 96 |
| Operating margin | 10.6% | 10.7% | 11.0% | 10.6% | 10.3% | 10.0% |
| Operating margin growth (bps) | -41 | -39 | 42 | 36 | 26 | 63 |
| Net profit margin | 7.6% | 7.8% | 16.0% | 20.4% | 8.4% | 7.0% |
| Net profit margin growth (bps) | -637 | -821 | -439 | 1,196 | 143 | 256 |