Operating income as a percentage of revenue
| Period | Value | YoY Change |
|---|---|---|
| TTM | -39.20% | - |
| 2019 | 0.00% | +100.0% |
| 2018 | -52.35% | -238.4% |
| 2017 | 37.81% | +214.9% |
| 2016 | -32.92% | -174.9% |
| 2015 | -11.97% | +74.1% |
| 2014 | -46.26% | -127.2% |
| 2013 | -20.36% | -130.0% |
| 2012 | -8.85% | -203.1% |
| 2011 | 8.59% | - |