| 年月 | 单位：% |
| 2009-12 | 37.45 |
| 2009-11 | 13.51 |
| 2009-10 | 33.15 |
| 2009-09 | 24.80 |
| 2009-08 | 37.10 |
| 2009-07 | 24.80 |
| 2009-06 | 28.60 |
| 2009-05 | 33.70 |
| 2009-04 | 13.70 |
| 2009-03 | 34.40 |
| 2009-02 | 31.90 |
| 2009-01 | 39.80 |
| 2008-12 | 61.40 |
| 2008-11 | 76.50 |
| 2008-10 | 87.50 |
| 2008-09 | 86.10 |
| 2008-08 | 84.40 |
| 2008-07 | 63.00 |
| 2008-06 | 50.80 |
| 2008-05 | 64.50 |
| 2008-04 | 56.80 |
| 2008-03 | 65.40 |
| 2008-02 | 50.30 |
| 2008-01 | 81.00 |
| 2007-12 | 47.90 |
| 2007-11 | 48.60 |
| 2007-10 | 60.60 |
| 2007-09 | 96.70 |
| 2007-08 | 92.20 |
| 2007-07 | 89.90 |
| 2007-06 | 133.33 |
| 2007-05 | 60.00 |
| 2007-04 | 32.14 |
| 2007-03 | 39.39 |
| 2007-02 | 57.14 |
| 2007-01 | 55.56 |
| 2006-12 | 49.00 |
| 2006-11 | 11.50 |
| 2006-10 | 5.40 |
| 2006-09 | -8.60 |
| 2006-08 | -7.40 |
| 2006-07 | 11.70 |
| 2006-06 | 26.90 |
| 2006-05 | 21.30 |
| 2006-04 | 14.20 |
| 2006-03 | 50.00 |
| 2006-02 | 78.00 |
| 2006-01 | 5.60 |
| 2005-12 | 9.90 |
| 2005-11 | 30.20 |
| 2005-10 | 28.10 |
| 2005-09 | 24.30 |
| 2005-08 | 39.00 |
| 2005-07 | 84.30 |
| 2005-06 | 20.80 |
| 2005-05 | 27.80 |
| 2005-04 | 51.60 |
| 2005-03 | 65.70 |
| 2005-02 | 23.40 |
| 2005-01 | 85.20 |
| 2004-12 | -42.90 |
| 2004-10 | -14.30 |
| 2004-09 | -7.70 |
| 2004-08 | 28.60 |
| 2004-07 | -12.50 |
| 2004-06 | 12.50 |
| 2004-05 | -9.10 |
| 2004-04 | 50.00 |
| 2004-03 | -11.10 |
| 2004-02 | -11.10 |
| 2004-01 | -30.80 |
| 2003-12 | 75.00 |
| 2003-11 | 7.10 |
| 2003-10 | 16.70 |
| 2003-09 | 30.00 |
| 2003-08 | -12.50 |
| 2003-07 | 33.30 |
| 2003-06 | 33.30 |
| 2003-05 | 37.50 |
| 2003-04 | -25.00 |
| 2003-03 | -10.00 |
| 2003-02 | 0.00 |
| 2003-01 | 8.33 |
| 2002-12 | -33.30 |
| 2002-11 | -17.60 |
| 2002-10 | -25.00 |
| 2002-09 | -37.50 |
| 2002-08 | 0.00 |
| 2002-07 | -25.00 |
| 2002-06 | -25.00 |
| 2002-05 | 14.30 |
| 2002-04 | -20.00 |
| 2002-02 | -18.20 |
| 2002-01 | 20.00 |
| 2001-11 | -5.60 |
| 2001-10 | 14.30 |
| 2001-09 | 33.30 |
| 2001-07 | -27.30 |
| 2001-06 | 66.70 |
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