| 年月 | 单位：% |
| 2009-05 | -12.30 |
| 2009-04 | -4.70 |
| 2009-03 | 13.30 |
| 2009-02 | -70.20 |
| 2009-01 | -67.42 |
| 2008-12 | -44.10 |
| 2008-11 | 27.70 |
| 2008-10 | -31.40 |
| 2008-09 | -19.70 |
| 2008-08 | 1.80 |
| 2008-07 | 98.10 |
| 2008-06 | 63.20 |
| 2008-05 | 16.10 |
| 2008-04 | -26.10 |
| 2008-03 | 11.90 |
| 2008-02 | 24.00 |
| 2008-01 | -10.73 |
| 2007-12 | 71.20 |
| 2007-11 | 36.00 |
| 2007-10 | 13.20 |
| 2007-09 | -5.30 |
| 2007-08 | -16.40 |
| 2007-07 | 27.70 |
| 2007-06 | 20.30 |
| 2007-05 | 5.10 |
| 2007-04 | 8.30 |
| 2007-03 | 15.40 |
| 2007-02 | -7.40 |
| 2007-01 | 50.05 |
| 2006-12 | -25.00 |
| 2006-11 | -18.00 |
| 2006-10 | 41.90 |
| 2006-09 | 20.40 |
| 2006-08 | 3.20 |
| 2006-07 | 33.30 |
| 2006-06 | 75.80 |
| 2006-05 | 53.60 |
| 2006-04 | 55.90 |
| 2006-03 | 38.70 |
| 2006-02 | 20.00 |
| 2005-12 | 15.70 |
| 2005-11 | -5.00 |
| 2005-10 | -46.20 |
| 2005-09 | -10.00 |
| 2005-08 | -18.90 |
| 2005-07 | -11.10 |
| 2005-06 | -30.80 |
| 2005-05 | -26.20 |
| 2005-04 | -39.20 |
| 2005-03 | -26.80 |
| 2005-02 | -19.20 |
| 2005-01 | 34.60 |
| 2004-12 | 5.30 |
| 2004-11 | -5.30 |
| 2004-10 | -17.70 |
| 2004-09 | -19.10 |
| 2004-08 | 24.00 |
| 2004-07 | 22.00 |
| 2004-06 | -10.00 |
| 2004-05 | 24.40 |
| 2004-04 | 5.70 |
| 2004-03 | 9.50 |
| 2004-02 | 36.00 |
| 2004-01 | -31.30 |
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