| 年月 | 单位：% |
| 2008-12 | 7.00 |
| 2008-11 | 3.40 |
| 2008-10 | 2.90 |
| 2008-09 | 4.00 |
| 2008-08 | 5.70 |
| 2008-07 | 4.40 |
| 2008-06 | 3.00 |
| 2008-05 | 2.00 |
| 2008-04 | -5.00 |
| 2008-03 | -16.90 |
| 2008-02 | 1.50 |
| 2008-01 | 2.06 |
| 2007-12 | 16.30 |
| 2007-11 | 16.40 |
| 2007-10 | 19.10 |
| 2007-09 | 15.10 |
| 2007-08 | 12.30 |
| 2007-07 | 9.90 |
| 2007-06 | 24.20 |
| 2007-05 | 29.20 |
| 2007-04 | 38.30 |
| 2007-03 | 42.80 |
| 2007-02 | 57.50 |
| 2007-01 | 98.54 |
| 2006-12 | 36.50 |
| 2006-11 | 42.20 |
| 2006-10 | 38.10 |
| 2006-09 | 39.00 |
| 2006-08 | 44.90 |
| 2006-07 | 49.50 |
| 2006-06 | 33.50 |
| 2006-05 | 26.20 |
| 2006-04 | 20.40 |
| 2006-03 | -32.00 |
| 2006-02 | 30.20 |
| 2006-01 | 15.79 |
| 2005-12 | -4.60 |
| 2005-11 | -4.20 |
| 2005-10 | -4.70 |
| 2005-09 | -8.80 |
| 2005-08 | 87.80 |
| 2005-07 | 91.20 |
| 2005-06 | 6.90 |
| 2005-05 | 12.60 |
| 2005-04 | 21.40 |
| 2005-03 | 13.50 |
| 2005-02 | 3.10 |
| 2005-01 | 32.00 |
| 2004-12 | 28.00 |
| 2004-11 | 34.20 |
| 2004-10 | 32.80 |
| 2004-09 | 31.60 |
| 2004-08 | 32.30 |
| 2004-07 | 34.40 |
| 2004-06 | 75.10 |
| 2004-05 | 63.00 |
| 2004-04 | 60.40 |
| 2004-03 | 80.80 |
| 2004-02 | 89.30 |
| 2004-01 | 15.70 |
| 2003-12 | 53.20 |
| 2003-11 | 54.30 |
| 2003-10 | 55.14 |
| 2003-09 | 60.56 |
| 2003-08 | 66.49 |
| 2003-07 | 62.97 |
| 2003-06 | 64.42 |
| 2003-05 | 69.55 |
| 2003-04 | 57.04 |
| 2003-03 | 40.31 |
| 2003-02 | 52.57 |
| 2003-01 | 63.69 |
| 2002-12 | -16.60 |
| 2002-11 | -19.99 |
| 2002-10 | -23.50 |
| 2002-09 | -30.40 |
| 2002-08 | -37.27 |
| 2002-07 | -44.16 |
| 2002-06 | -54.80 |
| 2002-05 | -57.87 |
| 2002-04 | -64.20 |
| 2002-03 | -48.92 |
| 2002-02 | -6.40 |
| 2002-01 | 2.04 |
| 2001-12 | 28.94 |
| 2001-11 | 30.06 |
| 2001-10 | 39.59 |
| 2001-09 | 44.94 |
| 2001-08 | 53.02 |
| 2001-07 | 62.91 |
| 2001-06 | 71.95 |
| 2001-05 | 72.83 |
| 2001-04 | 92.70 |
| 2001-03 | 85.30 |
| 2001-02 | 72.90 |
| 2001-01 | 60.70 |
| 2000-12 | 53.10 |
| 2000-11 | 54.60 |
| 2000-10 | 51.60 |
| 2000-09 | 54.90 |
| 2000-08 | 45.00 |
| 2000-07 | 47.10 |
| 2000-06 | 38.40 |
| 2000-05 | 19.70 |
| 2000-04 | 16.30 |
| 2000-03 | 22.30 |
| 2000-02 | 19.60 |
| 2000-01 | 0.80 |
| 1999-12 | -24.10 |
| 1999-11 | -30.50 |
| 1999-10 | -30.50 |
| 1999-09 | -35.60 |
| 1999-08 | -27.90 |
| 1999-07 | -30.30 |
| 1999-06 | -29.00 |
| 1999-05 | -38.20 |
| 1999-04 | -6.50 |
| 1999-03 | 9.30 |
| 1999-02 | 49.30 |
| 1999-01 | 140.40 |
| 1998-12 | 25.60 |
| 1998-11 | 62.90 |
| 1998-10 | 71.60 |
| 1998-09 | 72.20 |
| 1998-08 | 68.50 |
| 1998-07 | 64.40 |
| 1998-06 | 76.80 |
| 1998-05 | 70.90 |
| 1998-04 | 64.80 |
| 1998-03 | 3.50 |
| 1998-02 | -37.40 |
| 1998-01 | -42.30 |
| 1997-12 | 6.85 |
| 1997-11 | 4.32 |
| 1997-10 | 1.85 |
| 1997-09 | 3.69 |
| 1997-08 | 5.39 |
| 1997-07 | 3.82 |
| 1997-06 | 11.86 |
| 1997-05 | 0.69 |
| 1997-04 | 16.43 |
| 1997-03 | 1.21 |
| 1997-02 | 554.38 |
| 1997-01 | 8.60 |
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