| 年月 | 单位：% |
| 2009-11 | 8.80 |
| 2009-10 | 3.70 |
| 2009-09 | 3.70 |
| 2009-08 | 3.90 |
| 2009-07 | 12.40 |
| 2009-06 | 4.30 |
| 2009-05 | 5.60 |
| 2009-04 | 3.90 |
| 2009-03 | -3.90 |
| 2009-02 | -21.60 |
| 2009-01 | 28.30 |
| 2008-12 | 8.30 |
| 2008-11 | 9.60 |
| 2008-10 | -2.90 |
| 2008-09 | 10.60 |
| 2008-08 | 11.10 |
| 2008-07 | 11.60 |
| 2008-06 | 12.60 |
| 2008-05 | 16.30 |
| 2008-04 | 19.30 |
| 2008-03 | 16.60 |
| 2008-02 | 12.60 |
| 2008-01 | 8.70 |
| 2007-12 | 8.80 |
| 2007-11 | 8.10 |
| 2007-10 | 16.00 |
| 2007-09 | 10.80 |
| 2007-08 | 7.90 |
| 2007-07 | 13.60 |
| 2007-06 | 12.40 |
| 2007-05 | 10.10 |
| 2007-04 | 5.50 |
| 2007-03 | 8.80 |
| 2007-02 | 26.56 |
| 2007-01 | -3.60 |
| 2006-12 | 6.50 |
| 2006-11 | 9.90 |
| 2006-10 | 9.40 |
| 2006-09 | 6.20 |
| 2006-08 | 5.60 |
| 2006-07 | 3.68 |
| 2006-06 | 12.82 |
| 2006-05 | 9.53 |
| 2006-04 | 8.90 |
| 2006-03 | 16.37 |
| 2006-02 | 12.67 |
| 2006-01 | 10.52 |
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