| 年月 | 单位：% |
| 2008-12 | -3.00 |
| 2008-11 | -1.50 |
| 2008-10 | 42.10 |
| 2008-09 | 43.70 |
| 2008-08 | 37.70 |
| 2008-07 | 18.40 |
| 2008-06 | 36.40 |
| 2008-05 | 29.40 |
| 2008-04 | 14.00 |
| 2008-03 | 11.40 |
| 2008-02 | 45.10 |
| 2008-01 | 55.60 |
| 2007-12 | 24.10 |
| 2007-11 | 14.90 |
| 2007-10 | 8.60 |
| 2007-09 | 0.30 |
| 2007-08 | 17.60 |
| 2007-07 | 37.60 |
| 2007-06 | -3.09 |
| 2007-05 | 6.90 |
| 2007-04 | 4.88 |
| 2007-03 | 7.23 |
| 2007-02 | -14.81 |
| 2007-01 | 23.21 |
| 2006-12 | -1.80 |
| 2006-11 | 30.70 |
| 2006-10 | -0.10 |
| 2006-09 | 1.10 |
| 2006-08 | -4.40 |
| 2006-07 | -8.40 |
| 2006-06 | 18.80 |
| 2006-05 | 19.70 |
| 2006-04 | 7.90 |
| 2006-03 | 36.90 |
| 2006-02 | 23.40 |
| 2006-01 | -22.80 |
| 2005-12 | 24.10 |
| 2005-11 | 32.90 |
| 2005-10 | 54.40 |
| 2005-09 | 65.30 |
| 2005-08 | 72.60 |
| 2005-07 | 69.70 |
| 2005-06 | 83.30 |
| 2005-05 | 4.70 |
| 2005-04 | 81.00 |
| 2005-03 | -1.60 |
| 2005-02 | 4.90 |
| 2005-01 | 55.00 |
| 2004-12 | 14.80 |
| 2004-11 | 31.00 |
| 2004-10 | 14.80 |
| 2004-09 | 26.90 |
| 2004-08 | 50.00 |
| 2004-06 | 45.80 |
| 2004-05 | 36.80 |
| 2004-04 | 52.60 |
| 2004-03 | 42.90 |
| 2004-02 | 0.00 |
| 2004-01 | 4.80 |
| 2003-12 | 23.80 |
| 2003-11 | 35.00 |
| 2003-10 | 4.20 |
| 2003-09 | 14.30 |
| 2003-08 | 5.30 |
| 2003-07 | 14.30 |
| 2003-06 | 10.00 |
| 2003-05 | 26.70 |
| 2003-04 | 35.70 |
| 2003-03 | 61.50 |
| 2003-02 | 140.00 |
| 2003-01 | 17.65 |
| 2002-12 | 42.90 |
| 2002-11 | 25.00 |
| 2002-10 | 60.00 |
| 2002-09 | 90.90 |
| 2002-08 | 111.10 |
| 2002-07 | 61.50 |
| 2002-06 | 33.30 |
| 2002-05 | 25.00 |
| 2002-04 | 7.70 |
| 2002-02 | 11.10 |
| 2002-01 | 70.00 |
| 2001-12 | 5.00 |
| 2001-11 | 23.10 |
| 2001-10 | 25.00 |
| 2001-09 | -26.70 |
| 2001-08 | -43.80 |
| 2001-07 | -18.80 |
| 2001-06 | 62.50 |
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