| 年月 | 单位：% |
| 2009-12 | 10.54 |
| 2009-11 | 0.89 |
| 2009-10 | 7.72 |
| 2009-09 | -0.40 |
| 2009-08 | 2.20 |
| 2009-07 | 12.50 |
| 2009-06 | 13.60 |
| 2009-05 | 24.60 |
| 2009-04 | 21.80 |
| 2009-03 | 11.30 |
| 2009-02 | 8.00 |
| 2009-01 | 12.00 |
| 2008-12 | 28.90 |
| 2008-11 | 36.50 |
| 2008-10 | 36.80 |
| 2008-09 | 31.40 |
| 2008-08 | 29.00 |
| 2008-07 | 24.50 |
| 2008-06 | 1.20 |
| 2008-05 | 2.00 |
| 2008-04 | 17.30 |
| 2008-03 | -16.40 |
| 2008-02 | -2.10 |
| 2008-01 | 4.20 |
| 2007-12 | 13.90 |
| 2007-11 | 9.80 |
| 2007-10 | 9.10 |
| 2007-09 | 0.70 |
| 2007-08 | 12.80 |
| 2007-07 | 10.30 |
| 2007-06 | 48.39 |
| 2007-05 | 47.10 |
| 2007-04 | 21.21 |
| 2007-03 | 41.86 |
| 2007-02 | 39.53 |
| 2007-01 | 18.18 |
| 2006-12 | 7.20 |
| 2006-11 | 4.70 |
| 2006-10 | 5.20 |
| 2006-09 | 21.20 |
| 2006-08 | 7.70 |
| 2006-07 | -2.50 |
| 2006-06 | -0.30 |
| 2006-05 | 9.00 |
| 2006-04 | 7.20 |
| 2006-03 | 19.40 |
| 2006-02 | 9.30 |
| 2006-01 | 15.10 |
| 2005-12 | 14.20 |
| 2005-11 | 23.30 |
| 2005-10 | 19.10 |
| 2005-09 | 16.10 |
| 2005-08 | 2.70 |
| 2005-07 | 14.60 |
| 2005-06 | 24.30 |
| 2005-05 | 15.80 |
| 2005-04 | 37.30 |
| 2005-03 | 22.50 |
| 2005-02 | 33.00 |
| 2005-01 | 22.80 |
| 2004-12 | 4.30 |
| 2004-11 | 19.00 |
| 2004-10 | 9.50 |
| 2004-09 | -17.20 |
| 2004-08 | 21.10 |
| 2004-07 | -9.10 |
| 2004-06 | 5.90 |
| 2004-05 | 11.10 |
| 2004-03 | 10.50 |
| 2004-02 | -4.20 |
| 2004-01 | 13.60 |
| 2003-12 | 30.00 |
| 2003-11 | 11.10 |
| 2003-10 | 5.00 |
| 2003-09 | 45.00 |
| 2003-08 | 5.60 |
| 2003-07 | 22.20 |
| 2003-06 | -5.90 |
| 2003-05 | 20.00 |
| 2003-04 | 35.70 |
| 2003-03 | 11.80 |
| 2003-02 | 20.00 |
| 2003-01 | 15.79 |
| 2002-12 | 5.30 |
| 2002-10 | 5.30 |
| 2002-09 | 17.60 |
| 2002-08 | 20.00 |
| 2002-05 | -11.80 |
| 2002-04 | -6.70 |
| 2002-03 | -19.00 |
| 2002-02 | -16.70 |
| 2002-01 | -9.50 |
| 2001-12 | 5.60 |
| 2001-11 | -40.00 |
| 2001-10 | -38.70 |
| 2001-09 | -5.60 |
| 2001-08 | -16.70 |
| 2001-07 | 5.90 |
| 2001-06 | 121.40 |
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