| 年度 | 债务资本占比 | 债务资本成本率 | 股权资本占比 | 股权资本成本率 | 加权平均资本成本率 |
| 2003 | 20.85 | 5.36 | 79.15 | −5.84 | −3.50 |
| 2004 | 13.09 | 5.85 | 86.91 | −0.57 | 0.27 |
| 2005 | 10.67 | 5.58 | 89.33 | −17.13 | −14.71 |
| 2006 | 25.33 | 6.17 | 74.67 | 46.69 | 36.43 |
| 2007 | 36.94 | 7.59 | 63.06 | 153.45 | 99.57 |
| 2008 | 37.03 | 5.45 | 62.97 | −39.43 | −22.81 |
| 2009 | 49.98 | 0.00 | 50.02 | 18.45 | 9.23 |
| 2010 | 67.58 | 5.81 | 32.42 | −1.52 | 3.43 |
| 2011 | 70.95 | 6.56 | 29.05 | −6.19 | 2.86 |
| 2012 | 68.95 | 6.02 | 31.05 | −15.33 | −0.61 |
| 2013 | 67.23 | 6.00 | 32.77 | −3.41 | 2.92 |
| 2014 | 61.18 | 5.60 | 38.82 | 16.55 | 9.85 |
| 2015 | 57.34 | 4.40 | 42.66 | 54.11 | 25.61 |
| 2016 | 71.37 | 4.53 | 28.63 | −15.93 | −1.33 |
| 2017 | 69.13 | 4.59 | 30.87 | 8.03 | 5.65 |
| 2018 | 66.93 | 4.63 | 33.07 | −14.02 | −1.54 |
| 2019 | 65.33 | 4.59 | 34.67 | 8.13 | 5.82 |
| 2020 | 66.52 | 4.59 | 33.48 | 3.53 | 4.24 |
| 2021 | 62.71 | 4.44 | 37.29 | 18.11 | 9.53 |