| 年月 | 单位：% |
| 2008-12 | 49.30 |
| 2008-11 | 25.90 |
| 2008-10 | 2.30 |
| 2008-09 | 24.90 |
| 2008-08 | 73.50 |
| 2008-07 | 72.50 |
| 2008-06 | 20.00 |
| 2008-05 | 22.20 |
| 2008-04 | 22.20 |
| 2008-03 | 23.10 |
| 2008-02 | -33.30 |
| 2008-01 | -27.60 |
| 2007-12 | 20.00 |
| 2007-11 | 45.80 |
| 2007-10 | 33.30 |
| 2007-09 | 87.10 |
| 2007-08 | 40.60 |
| 2007-07 | 61.30 |
| 2007-06 | 66.67 |
| 2007-05 | 0.00 |
| 2007-04 | 28.57 |
| 2007-03 | 0.00 |
| 2007-02 | 333.33 |
| 2007-01 | 228.57 |
| 2006-12 | -28.50 |
| 2006-11 | -14.40 |
| 2006-10 | -31.90 |
| 2006-09 | -8.00 |
| 2006-08 | -1.80 |
| 2006-07 | 3.50 |
| 2006-06 | 9.00 |
| 2006-05 | -4.10 |
| 2006-04 | 3.00 |
| 2006-03 | 24.40 |
| 2006-02 | -15.90 |
| 2006-01 | -25.20 |
| 2005-12 | 16.60 |
| 2005-11 | 4.30 |
| 2005-10 | 2.30 |
| 2005-09 | 16.80 |
| 2005-08 | -5.30 |
| 2005-07 | 5.80 |
| 2005-06 | 2.20 |
| 2005-05 | 3.30 |
| 2005-04 | 25.40 |
| 2005-03 | 10.00 |
| 2005-02 | -41.00 |
| 2005-01 | 34.20 |
| 2004-12 | 100.00 |
| 2004-11 | 16.70 |
| 2004-10 | 50.00 |
| 2004-09 | 40.00 |
| 2004-08 | 40.00 |
| 2004-07 | 16.70 |
| 2004-06 | 20.00 |
| 2004-05 | 40.00 |
| 2004-03 | 50.00 |
| 2004-02 | -25.00 |
| 2004-01 | -20.00 |
| 2003-11 | 66.70 |
| 2003-10 | 100.00 |
| 2003-09 | 66.70 |
| 2003-08 | 66.70 |
| 2003-07 | -66.70 |
| 2003-06 | 0.00 |
| 2003-05 | 66.70 |
| 2003-04 | 150.00 |
| 2003-03 | 100.00 |
| 2003-02 | 100.00 |
| 2003-01 | 25.00 |
| 2002-12 | 33.30 |
| 2002-11 | -25.00 |
| 2002-10 | -40.00 |
| 2002-09 | -25.00 |
| 2002-08 | 0.00 |
| 2002-06 | 25.00 |
| 2002-05 | -25.00 |
| 2002-04 | -33.30 |
| 2002-03 | -50.00 |
| 2002-02 | -50.00 |
| 2002-01 | -25.00 |
| 2001-12 | -40.00 |
| 2001-11 | 100.00 |
| 2001-10 | 150.00 |
| 2001-09 | 33.30 |
| 2001-07 | -40.00 |
| 2001-06 | 100.00 |
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