| 年月 | 单位：% |
| 2008-12 | 35.70 |
| 2008-11 | 12.80 |
| 2008-10 | -5.80 |
| 2008-09 | -5.30 |
| 2008-08 | 22.60 |
| 2008-07 | 12.10 |
| 2008-06 | 15.90 |
| 2008-05 | 11.60 |
| 2008-04 | -4.70 |
| 2008-03 | 0.40 |
| 2008-02 | 0.70 |
| 2008-01 | 2.06 |
| 2007-12 | 12.30 |
| 2007-11 | -2.00 |
| 2007-10 | 72.30 |
| 2007-09 | 45.90 |
| 2007-08 | 31.70 |
| 2007-07 | 6.80 |
| 2007-06 | 2.20 |
| 2007-05 | 0.20 |
| 2007-04 | 15.50 |
| 2007-03 | 22.00 |
| 2007-02 | 22.10 |
| 2007-01 | 98.54 |
| 2006-12 | 19.90 |
| 2006-11 | 80.50 |
| 2006-10 | 25.60 |
| 2006-09 | -1.50 |
| 2006-08 | 16.80 |
| 2006-07 | 45.90 |
| 2006-06 | 62.90 |
| 2006-05 | 61.50 |
| 2006-04 | 33.70 |
| 2006-03 | -65.30 |
| 2006-02 | 47.20 |
| 2006-01 | 15.79 |
| 2005-12 | 27.30 |
| 2005-11 | 1.00 |
| 2005-10 | 3.30 |
| 2005-09 | 37.70 |
| 2005-08 | 100.80 |
| 2005-07 | 181.80 |
| 2005-06 | -13.00 |
| 2005-05 | -10.10 |
| 2005-04 | 33.70 |
| 2005-03 | 23.30 |
| 2005-02 | -23.50 |
| 2005-01 | 32.00 |
| 2004-12 | -7.60 |
| 2004-11 | 44.80 |
| 2004-10 | 42.30 |
| 2004-09 | 23.90 |
| 2004-08 | 18.90 |
| 2004-07 | 17.30 |
| 2004-06 | 131.40 |
| 2004-05 | 47.60 |
| 2004-04 | 55.40 |
| 2004-03 | 86.60 |
| 2004-02 | 204.80 |
| 2004-01 | 15.70 |
| 2003-12 | 53.87 |
| 2003-11 | 47.78 |
| 2003-10 | 21.36 |
| 2003-09 | 25.21 |
| 2003-08 | 83.75 |
| 2003-07 | 64.50 |
| 2003-06 | 54.85 |
| 2003-05 | 116.57 |
| 2003-04 | 97.48 |
| 2003-03 | 27.47 |
| 2003-02 | 39.90 |
| 2003-01 | 63.69 |
| 2002-12 | 38.41 |
| 2002-11 | 44.98 |
| 2002-10 | 130.12 |
| 2002-09 | 52.52 |
| 2002-08 | 53.77 |
| 2002-07 | 91.13 |
| 2002-06 | -27.30 |
| 2002-05 | 10.81 |
| 2002-04 | -9.99 |
| 2002-03 | -71.51 |
| 2002-02 | 6.59 |
| 2002-01 | 2.04 |
| 2001-12 | 2.54 |
| 2001-11 | -33.38 |
| 2001-10 | -14.37 |
| 2001-09 | -2.84 |
| 2001-08 | 1.61 |
| 2001-07 | 7.79 |
| 2001-06 | 68.84 |
| 2001-05 | 85.77 |
| 2001-04 | 123.70 |
| 2001-03 | 91.00 |
| 2001-02 | 110.80 |
| 2001-01 | 60.70 |
| 2000-12 | 62.30 |
| 2000-11 | 80.90 |
| 2000-10 | 29.00 |
| 2000-09 | 182.10 |
| 2000-08 | 33.90 |
| 2000-07 | 122.80 |
| 2000-06 | 146.30 |
| 2000-05 | 31.30 |
| 2000-04 | 1.10 |
| 2000-03 | 22.30 |
| 2000-02 | 54.70 |
| 2000-01 | 0.79 |
| 1999-12 | 36.70 |
| 1999-11 | -7.30 |
| 1999-10 | 9.18 |
| 1999-09 | -51.30 |
| 1999-08 | -44.75 |
| 1999-07 | -37.16 |
| 1999-06 | -59.00 |
| 1999-05 | -43.70 |
| 1999-04 | -26.61 |
| 1999-03 | 11.37 |
| 1999-02 | -27.73 |
| 1999-01 | 140.40 |
| 1998-12 | -29.20 |
| 1998-11 | 16.00 |
| 1998-10 | 67.00 |
| 1998-09 | 135.40 |
| 1998-08 | 97.30 |
| 1998-07 | 26.00 |
| 1998-06 | 98.20 |
| 1998-05 | 82.60 |
| 1998-04 | 50.60 |
| 1998-03 | 120.00 |
| 1998-02 | -31.20 |
| 1998-01 | -42.30 |
| 1997-12 | -19.44 |
| 1997-11 | -19.25 |
| 1997-10 | -30.38 |
| 1997-09 | -8.19 |
| 1997-08 | 14.23 |
| 1997-07 | -26.05 |
| 1997-06 | 98.49 |
| 1997-05 | 37.36 |
| 1997-04 | -55.22 |
| 1997-03 | -60.90 |
| 1997-02 | 86.08 |
| 1997-01 | -8.60 |
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