| 年月 | 单位：% |
| 2008-12 | -65.50 |
| 2008-11 | -55.00 |
| 2008-10 | -11.80 |
| 2008-09 | -12.50 |
| 2008-08 | 15.50 |
| 2008-07 | 10.30 |
| 2008-06 | 0.00 |
| 2008-05 | -11.30 |
| 2008-04 | 32.10 |
| 2008-03 | 10.90 |
| 2008-02 | 7.60 |
| 2008-01 | 3.92 |
| 2007-12 | 20.80 |
| 2007-11 | -13.80 |
| 2007-10 | -9.50 |
| 2007-09 | 18.50 |
| 2007-08 | -14.60 |
| 2007-07 | 14.90 |
| 2007-06 | 6.50 |
| 2007-05 | 8.50 |
| 2007-04 | -14.80 |
| 2007-03 | 38.20 |
| 2007-02 | -6.30 |
| 2007-01 | 9.31 |
| 2006-12 | 2.80 |
| 2006-11 | 41.10 |
| 2006-10 | 24.60 |
| 2006-09 | 25.60 |
| 2006-08 | 47.70 |
| 2006-07 | 45.20 |
| 2006-06 | 127.30 |
| 2006-05 | 74.20 |
| 2006-04 | 21.10 |
| 2006-03 | 11.00 |
| 2006-02 | 34.00 |
| 2006-01 | 43.03 |
| 2005-12 | -6.10 |
| 2005-11 | 5.60 |
| 2005-10 | 31.10 |
| 2005-09 | -6.50 |
| 2005-08 | -19.50 |
| 2005-07 | -22.30 |
| 2005-06 | -35.60 |
| 2005-05 | -17.60 |
| 2005-04 | -5.00 |
| 2005-03 | 1.10 |
| 2005-02 | 51.60 |
| 2005-01 | -2.90 |
| 2004-12 | 29.50 |
| 2004-11 | 6.70 |
| 2004-10 | -13.90 |
| 2004-09 | 1.10 |
| 2004-08 | 8.00 |
| 2004-07 | 50.70 |
| 2004-06 | 27.90 |
| 2004-05 | 17.50 |
| 2004-04 | 4.20 |
| 2004-03 | 9.90 |
| 2004-02 | 13.00 |
| 2004-01 | 13.60 |
| 2003-12 | 5.49 |
| 2003-11 | 9.03 |
| 2003-10 | 8.09 |
| 2003-09 | -9.90 |
| 2003-08 | 17.33 |
| 2003-07 | 0.00 |
| 2003-06 | 14.84 |
| 2003-05 | 28.00 |
| 2003-04 | 62.71 |
| 2003-03 | 47.01 |
| 2003-02 | 42.11 |
| 2003-01 | 19.53 |
| 2002-12 | 51.85 |
| 2002-11 | 23.02 |
| 2002-10 | 37.30 |
| 2002-09 | 77.19 |
| 2002-08 | 26.05 |
| 2002-07 | 44.09 |
| 2002-06 | -5.88 |
| 2002-05 | -9.42 |
| 2002-04 | -17.48 |
| 2002-03 | -24.03 |
| 2002-02 | -34.67 |
| 2002-01 | 37.63 |
| 2001-12 | -76.81 |
| 2001-11 | 16.67 |
| 2001-10 | 135.90 |
| 2001-09 | 13.43 |
| 2001-08 | 7.67 |
| 2001-07 | -13.05 |
| 2001-06 | 13.01 |
| 2001-05 | 0.16 |
| 2001-04 | 3.10 |
| 2001-03 | 24.10 |
| 2001-02 | 8.10 |
| 2001-01 | 7.20 |
| 2000-12 | 88.70 |
| 2000-11 | 71.00 |
| 2000-10 | 112.70 |
| 2000-09 | 64.60 |
| 2000-08 | 86.00 |
| 2000-07 | 67.90 |
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