| 年月 | 单位：% |
| 2008-12 | -39.90 |
| 2008-11 | 29.50 |
| 2008-10 | 17.20 |
| 2008-09 | 3.10 |
| 2008-08 | -61.30 |
| 2008-07 | -32.30 |
| 2008-06 | -1.40 |
| 2008-05 | -30.40 |
| 2008-04 | 23.90 |
| 2008-03 | -8.30 |
| 2008-02 | -28.40 |
| 2008-01 | -29.12 |
| 2007-12 | -22.70 |
| 2007-11 | -11.00 |
| 2007-10 | 39.20 |
| 2007-09 | 108.30 |
| 2007-08 | 69.90 |
| 2007-07 | 44.70 |
| 2007-06 | 42.20 |
| 2007-05 | 140.00 |
| 2007-04 | 3.00 |
| 2007-03 | 19.10 |
| 2007-02 | -21.60 |
| 2007-01 | -13.17 |
| 2006-12 | 108.10 |
| 2006-11 | -0.40 |
| 2006-10 | -1.10 |
| 2006-09 | -1.30 |
| 2006-08 | 8.60 |
| 2006-07 | 30.70 |
| 2006-06 | 55.30 |
| 2006-05 | 29.70 |
| 2006-04 | 5.19 |
| 2006-03 | -38.80 |
| 2006-02 | -45.00 |
| 2006-01 | -51.99 |
| 2005-12 | -61.30 |
| 2005-11 | -28.30 |
| 2005-10 | -33.10 |
| 2005-09 | -42.00 |
| 2005-08 | -53.50 |
| 2005-07 | -48.20 |
| 2005-06 | -59.60 |
| 2005-05 | -44.00 |
| 2005-04 | -61.10 |
| 2005-03 | -34.60 |
| 2005-02 | -38.30 |
| 2005-01 | 51.90 |
| 2004-12 | -26.00 |
| 2004-11 | -25.80 |
| 2004-10 | -11.40 |
| 2004-09 | 1.20 |
| 2004-08 | 4.60 |
| 2004-07 | 13.80 |
| 2004-06 | 17.70 |
| 2004-05 | 44.20 |
| 2004-04 | 47.60 |
| 2004-03 | 26.50 |
| 2004-02 | 106.70 |
| 2004-01 | 9.70 |
| 2003-12 | 48.34 |
| 2003-11 | 0.39 |
| 2003-10 | 3.66 |
| 2003-09 | -7.88 |
| 2003-08 | -5.74 |
| 2003-07 | 14.06 |
| 2003-06 | 1.38 |
| 2003-05 | 3.39 |
| 2003-04 | -18.43 |
| 2003-03 | -17.97 |
| 2003-02 | 227.51 |
| 2003-01 | 63.23 |
| 2002-12 | 29.99 |
| 2002-11 | 63.88 |
| 2002-10 | 71.25 |
| 2002-09 | 55.65 |
| 2002-08 | 47.85 |
| 2002-07 | -0.46 |
| 2002-06 | 13.81 |
| 2002-05 | 50.05 |
| 2002-04 | 86.46 |
| 2002-03 | -61.05 |
| 2002-02 | -21.23 |
| 2002-01 | -13.79 |
| 2001-12 | -5.41 |
| 2001-11 | -5.45 |
| 2001-10 | 19.79 |
| 2001-09 | -3.78 |
| 2001-08 | 2.93 |
| 2001-07 | -12.45 |
| 2001-06 | 17.69 |
| 2001-05 | 33.33 |
| 2001-04 | 40.10 |
| 2001-03 | -1.40 |
| 2001-02 | 7.60 |
| 2001-01 | 84.00 |
| 2000-12 | 3.50 |
| 2000-11 | 0.40 |
| 2000-10 | 7.40 |
| 2000-09 | 15.10 |
| 2000-08 | 20.40 |
| 2000-07 | 24.50 |
| 2000-06 | 6.70 |
| 2000-05 | 15.00 |
| 2000-04 | 17.10 |
| 1999-12 | 92.79 |
| 1999-11 | 101.17 |
| 1999-10 | 128.89 |
| 1999-09 | 133.50 |
| 1999-08 | 68.27 |
| 1999-07 | 88.39 |
| 1999-06 | 101.57 |
| 1999-05 | 26.93 |
| 1999-04 | 12.16 |
| 1999-03 | 3.80 |
| 1999-02 | -5.23 |
| 1999-01 | 19.23 |
| 1998-06 | 34.00 |
| 1998-05 | 25.80 |
| 1998-04 | 62.00 |
| 1998-03 | 47.10 |
| 1998-02 | 52.00 |
| 1998-01 | 3.80 |
| 1997-12 | -25.30 |
| 1997-11 | 12.10 |
| 1997-10 | 9.00 |
| 1997-09 | 15.10 |
| 1997-08 | -6.60 |
| 1997-07 | -28.70 |
| 1997-06 | 3.00 |
| 1997-05 | 128.30 |
| 1997-04 | -6.80 |
| 1997-03 | -12.80 |
| 1997-02 | -16.70 |
| 1997-01 | 6.00 |
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