| 年月 | 单位：% |
| 2008-12 | 47.30 |
| 2008-11 | -12.10 |
| 2008-10 | 0.30 |
| 2008-09 | 4.30 |
| 2008-08 | -0.60 |
| 2008-07 | -14.90 |
| 2008-06 | 4.00 |
| 2008-05 | -3.90 |
| 2008-04 | -17.10 |
| 2008-03 | -22.10 |
| 2008-02 | -54.90 |
| 2008-01 | 93.80 |
| 2007-12 | -36.00 |
| 2007-11 | -32.00 |
| 2007-10 | -28.70 |
| 2007-09 | -15.70 |
| 2007-08 | 14.20 |
| 2007-07 | 21.80 |
| 2007-06 | 11.50 |
| 2007-05 | 44.80 |
| 2007-04 | 75.70 |
| 2007-03 | 141.10 |
| 2007-02 | 145.00 |
| 2007-01 | 16.75 |
| 2006-12 | -37.20 |
| 2006-11 | -38.20 |
| 2006-10 | -45.20 |
| 2006-09 | -48.00 |
| 2006-08 | -51.70 |
| 2006-07 | -53.00 |
| 2006-06 | -51.40 |
| 2006-05 | -60.60 |
| 2006-04 | -59.30 |
| 2006-03 | 10.60 |
| 2006-02 | -40.60 |
| 2006-01 | -43.29 |
| 2005-12 | 44.40 |
| 2005-11 | 30.40 |
| 2005-10 | 36.40 |
| 2005-09 | 23.40 |
| 2005-08 | -9.20 |
| 2005-07 | 10.00 |
| 2005-06 | -6.10 |
| 2005-05 | -16.90 |
| 2005-04 | -14.40 |
| 2005-03 | 4.10 |
| 2005-02 | 767.10 |
| 2005-01 | 90.80 |
| 2004-12 | 4.50 |
| 2004-11 | 2.50 |
| 2004-10 | -1.60 |
| 2004-09 | 18.90 |
| 2004-08 | -9.50 |
| 2004-07 | -15.40 |
| 2004-06 | 20.50 |
| 2004-05 | 29.20 |
| 2004-04 | 13.80 |
| 2004-03 | 32.40 |
| 2004-02 | -2.30 |
| 2004-01 | -1.80 |
| 2003-12 | 11.67 |
| 2003-11 | 12.56 |
| 2003-10 | 21.80 |
| 2003-09 | 26.52 |
| 2003-08 | 18.35 |
| 2003-07 | 32.65 |
| 2003-06 | 28.36 |
| 2003-05 | 27.62 |
| 2003-04 | 4.78 |
| 2003-03 | -4.60 |
| 2003-02 | 81.64 |
| 2003-01 | 125.20 |
| 2002-12 | -3.38 |
| 2002-11 | 36.21 |
| 2002-10 | 31.28 |
| 2002-09 | 11.31 |
| 2002-08 | 25.74 |
| 2002-07 | 16.40 |
| 2002-06 | 17.43 |
| 2002-05 | 2.03 |
| 2002-04 | 31.80 |
| 2002-03 | 18.50 |
| 2002-02 | -38.36 |
| 2002-01 | -15.17 |
| 2001-12 | 12.26 |
| 2001-11 | -15.37 |
| 2001-10 | -31.62 |
| 2001-09 | -28.80 |
| 2001-08 | -29.82 |
| 2001-07 | -23.92 |
| 2001-06 | -31.71 |
| 2001-05 | -29.11 |
| 2001-04 | -45.00 |
| 2001-03 | -45.60 |
| 2001-02 | -29.40 |
| 2001-01 | -67.70 |
| 2000-12 | 0.60 |
| 2000-11 | 7.80 |
| 2000-10 | 2.50 |
| 2000-09 | 4.70 |
| 2000-08 | 6.60 |
| 2000-07 | 34.80 |
| 2000-06 | 22.40 |
| 2000-05 | 19.00 |
| 2000-04 | 11.30 |
| 2000-03 | 16.30 |
| 2000-02 | 25.40 |
| 2000-01 | -33.90 |
| 1999-12 | 1.80 |
| 1999-11 | -3.40 |
| 1999-10 | -4.40 |
| 1999-09 | -4.40 |
| 1999-08 | -3.80 |
| 1999-07 | -7.40 |
| 1999-06 | -4.90 |
| 1999-05 | -18.20 |
| 1999-04 | -4.40 |
| 1999-03 | -11.50 |
| 1999-02 | 3.90 |
| 1999-01 | -23.60 |
| 1998-12 | 16.90 |
| 1998-11 | 25.00 |
| 1998-10 | 21.90 |
| 1998-09 | 45.20 |
| 1998-08 | 41.20 |
| 1998-07 | 44.30 |
| 1998-06 | 42.50 |
| 1998-05 | 44.60 |
| 1998-04 | 28.60 |
| 1998-03 | 25.50 |
| 1998-02 | 39.70 |
| 1998-01 | 18.50 |
| 1997-12 | 4.00 |
| 1997-11 | 2.80 |
| 1997-10 | 6.80 |
| 1997-09 | 4.78 |
| 1997-08 | 4.10 |
| 1997-07 | 6.10 |
| 1997-06 | 3.71 |
| 1997-05 | 11.64 |
| 1997-04 | 12.86 |
| 1997-03 | 10.46 |
| 1997-02 | 2.69 |
| 1997-01 | 0.50 |
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