Margins
| TTM | 2015 | 2014 | 2013 | 2012 | 2011 | |
|---|---|---|---|---|---|---|
| Gross margin | 37.1% | 37.1% | 36.8% | 37.0% | 37.0% | 36.7% |
| Gross margin growth (bps) | 2 | 24 | -20 | 7 | 26 | -63 |
| Operating margin | -6.4% | -5.8% | 5.9% | 5.4% | 7.2% | 7.0% |
| Operating margin growth (bps) | -991 | -1,171 | 50 | -184 | 18 | 123 |
| Net profit margin | -7.3% | -6.5% | 3.6% | 2.0% | 3.5% | 2.7% |
| Net profit margin growth (bps) | -1,009 | -1,003 | 157 | -146 | 77 | 149 |