Margins
| TTM | 2017 | 2016 | 2015 | 2014 | 2013 | |
|---|---|---|---|---|---|---|
| Gross margin | 31.5% | 32.0% | 31.8% | 31.6% | 32.1% | 33.1% |
| Gross margin growth (bps) | -92 | 25 | 19 | -48 | -104 | 90 |
| Operating margin | 0.7% | 1.6% | 2.9% | 2.6% | 2.6% | 4.8% |
| Operating margin growth (bps) | -306 | -127 | 31 | 0 | -220 | 201 |
| Net profit margin | -0.6% | 0.1% | 1.7% | 1.5% | 1.5% | 2.8% |
| Net profit margin growth (bps) | -280 | -154 | 17 | -3 | -129 | 123 |