| 年月 | 单位：亿元 |
| 2010-04 | 45.04 |
| 2010-03 | 48.23 |
| 2010-02 | 41.23 |
| 2010-01 | 43.20 |
| 2009-12 | 46.48 |
| 2009-11 | 43.97 |
| 2009-10 | 43.41 |
| 2009-09 | 42.11 |
| 2009-08 | 41.86 |
| 2009-07 | 40.48 |
| 2009-06 | 38.32 |
| 2009-05 | 36.86 |
| 2009-04 | 35.70 |
| 2009-03 | 36.74 |
| 2009-02 | 33.51 |
| 2009-01 | 34.19 |
| 2008-12 | 33.81 |
| 2008-11 | 30.88 |
| 2008-10 | 30.85 |
| 2008-09 | 31.38 |
| 2008-08 | 30.74 |
| 2008-07 | 29.66 |
| 2008-06 | 29.60 |
| 2008-05 | 29.90 |
| 2008-04 | 28.83 |
| 2008-03 | 30.00 |
| 2008-02 | 26.14 |
| 2008-01 | 25.99 |
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