| 年月 | 单位：% |
| 2007-12 | -67.20 |
| 2007-11 | -67.40 |
| 2007-10 | -63.30 |
| 2007-09 | -55.30 |
| 2007-08 | -37.20 |
| 2007-07 | -36.50 |
| 2007-06 | 1.00 |
| 2007-05 | 0.60 |
| 2007-04 | -18.60 |
| 2007-03 | -35.50 |
| 2007-02 | -95.50 |
| 2007-01 | -96.60 |
| 2006-12 | 66.00 |
| 2006-11 | 169.40 |
| 2006-10 | 169.30 |
| 2006-09 | 121.30 |
| 2006-08 | 56.80 |
| 2006-07 | 45.80 |
| 2006-06 | -9.10 |
| 2006-05 | -9.40 |
| 2006-04 | -9.80 |
| 2006-03 | 1973.40 |
| 2006-02 | 2589.30 |
| 2006-01 | 5067.80 |
| 2005-12 | -43.90 |
| 2005-11 | -61.50 |
| 2005-10 | -62.20 |
| 2005-09 | -52.90 |
| 2005-08 | -53.10 |
| 2005-07 | -59.90 |
| 2005-06 | -60.10 |
| 2005-05 | -52.90 |
| 2005-04 | -39.80 |
| 2005-03 | -95.90 |
| 2005-02 | -97.10 |
| 2005-01 | -94.80 |
| 2004-12 | -27.60 |
| 2004-11 | -24.40 |
| 2004-10 | -28.30 |
| 2004-09 | -39.30 |
| 2004-08 | -36.90 |
| 2004-07 | -28.80 |
| 2004-06 | -16.00 |
| 2004-05 | -24.20 |
| 2004-04 | -26.50 |
| 2004-03 | -38.80 |
| 2004-02 | -36.10 |
| 2004-01 | -62.80 |
| 2003-12 | 3.70 |
| 2003-11 | -0.80 |
| 2003-10 | 8.10 |
| 2003-09 | 15.30 |
| 2003-08 | 29.40 |
| 2003-07 | 73.60 |
| 2003-06 | 77.10 |
| 2003-05 | 152.00 |
| 2003-04 | 141.30 |
| 2003-03 | 82.00 |
| 2003-02 | 279.40 |
| 2003-01 | 249.60 |
| 2002-12 | 284.10 |
| 2002-11 | 277.80 |
| 2002-10 | 224.90 |
| 2002-09 | 239.30 |
| 2002-08 | 191.40 |
| 2002-07 | 97.10 |
| 2002-06 | 64.80 |
| 2002-05 | 23.20 |
| 2002-04 | 3.30 |
| 2002-03 | 17.10 |
| 2002-02 | -44.30 |
| 2002-01 | -29.60 |
| 2001-12 | -46.00 |
| 2001-11 | -38.30 |
| 2001-10 | -14.90 |
| 2001-09 | -27.80 |
| 2001-08 | 3.10 |
| 2001-07 | 30.50 |
| 2001-06 | 30.60 |
| 2001-05 | 25.10 |
| 2001-04 | 81.40 |
| 2001-03 | 61.80 |
| 2001-02 | 28.70 |
| 2001-01 | -30.40 |
| 2000-12 | 197.70 |
| 2000-11 | 144.90 |
| 2000-10 | 80.20 |
| 2000-09 | 84.20 |
| 2000-08 | 60.70 |
| 2000-07 | 19.00 |
| 2000-06 | 43.70 |
| 2000-05 | 63.80 |
| 2000-04 | 17.60 |
| 2000-03 | 61.50 |
| 2000-02 | 41.40 |
| 2000-01 | 114.70 |
| 1999-12 | -62.10 |
| 1999-11 | -56.80 |
| 1999-10 | -54.90 |
| 1999-09 | -52.90 |
| 1999-08 | -61.10 |
| 1999-07 | -55.00 |
| 1999-06 | -52.60 |
| 1999-05 | -48.70 |
| 1999-04 | -46.20 |
| 1999-03 | -53.30 |
| 1999-02 | -51.60 |
| 1999-01 | -36.70 |
| 1998-12 | -28.00 |
| 1998-11 | -30.40 |
| 1998-10 | -32.50 |
| 1998-09 | -30.50 |
| 1998-08 | -23.00 |
| 1998-07 | -21.20 |
| 1998-06 | -24.50 |
| 1998-05 | -37.20 |
| 1998-04 | -6.20 |
| 1998-03 | 23.00 |
| 1998-02 | 71.00 |
| 1998-01 | -26.70 |
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