| 年月 | 单位：% |
| 2009-05 | -0.32 |
| 2009-04 | -0.34 |
| 2009-03 | -35.94 |
| 2009-02 | -35.19 |
| 2009-01 | 15.11 |
| 2008-12 | 4.90 |
| 2008-11 | 7.40 |
| 2008-10 | 10.60 |
| 2008-09 | 10.80 |
| 2008-08 | 12.80 |
| 2008-07 | 16.80 |
| 2008-06 | 20.10 |
| 2008-05 | 22.70 |
| 2008-04 | 23.50 |
| 2008-03 | 24.50 |
| 2008-02 | 20.00 |
| 2008-01 | 17.43 |
| 2007-12 | 43.40 |
| 2007-11 | 42.70 |
| 2007-10 | 42.70 |
| 2007-09 | 44.10 |
| 2007-08 | 46.50 |
| 2007-07 | 45.60 |
| 2007-06 | 43.10 |
| 2007-05 | 45.90 |
| 2007-04 | 47.30 |
| 2007-03 | 37.00 |
| 2007-02 | 42.80 |
| 2007-01 | 64.29 |
| 2006-12 | 52.00 |
| 2006-11 | 59.10 |
| 2006-10 | 53.30 |
| 2006-09 | 52.90 |
| 2006-08 | 55.40 |
| 2006-07 | 59.80 |
| 2006-06 | 66.70 |
| 2006-05 | 75.20 |
| 2006-04 | 76.50 |
| 2006-03 | 80.30 |
| 2006-02 | 93.00 |
| 2005-12 | 18.40 |
| 2005-11 | 11.30 |
| 2005-10 | 3.50 |
| 2005-09 | -1.30 |
| 2005-08 | -4.00 |
| 2005-07 | 0.10 |
| 2005-06 | -11.70 |
| 2005-05 | -15.00 |
| 2005-04 | -13.20 |
| 2005-03 | -16.20 |
| 2005-02 | -15.10 |
| 2005-01 | -3.80 |
| 2004-12 | 23.30 |
| 2004-11 | 28.50 |
| 2004-10 | 34.80 |
| 2004-09 | 42.70 |
| 2004-08 | 49.70 |
| 2004-07 | 53.30 |
| 2004-06 | 54.00 |
| 2004-05 | 57.40 |
| 2004-04 | 60.20 |
| 2004-03 | 54.70 |
| 2004-02 | 41.40 |
| 2004-01 | 4.60 |
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