| 时间 | 回报潜在增长率 | 预期股权回报 |
| 2004 | 11.49% | 20.89% |
| 2005 | 11.49% | 22.30% |
| 2006 | 11.49% | 14.99% |
| 2007 | 11.49% | 12.58% |
| 2008 | 11.49% | 14.53% |
| 2009 | 11.49% | 13.33% |
| 2010 | 11.49% | 13.71% |
| 2011 | 11.49% | 14.39% |
| 2012 | 11.49% | 14.47% |
| 2013 | 11.49% | 15.00% |
| 2014 | 11.49% | 13.94% |
| 2015 | 11.49% | 14.00% |
| 2016 | 11.49% | 14.53% |
| 2017 | 11.49% | 14.19% |
| 2018 | 11.49% | 15.14% |
| 2019 | 11.49% | 14.56% |