| 年月 | 单位：% |
| 2010-12 | 0.40 |
| 2010-11 | -7.80 |
| 2010-10 | -7.47 |
| 2010-09 | 8.40 |
| 2010-08 | 13.80 |
| 2010-07 | 1.00 |
| 2010-06 | 15.40 |
| 2010-05 | 22.75 |
| 2010-04 | 9.60 |
| 2010-03 | -8.80 |
| 2010-02 | 4.80 |
| 2010-01 | 47.59 |
| 2009-12 | 6.00 |
| 2009-11 | 17.80 |
| 2009-10 | 19.70 |
| 2009-09 | 14.52 |
| 2009-08 | 10.60 |
| 2009-07 | 9.49 |
| 2009-06 | 7.38 |
| 2009-05 | 8.90 |
| 2009-04 | 8.60 |
| 2009-03 | 1.30 |
| 2009-02 | 13.00 |
| 2009-01 | 2.62 |
| 2008-12 | -20.20 |
| 2008-11 | -23.30 |
| 2008-10 | -30.30 |
| 2008-09 | -22.00 |
| 2008-08 | -8.10 |
| 2008-07 | -6.40 |
| 2008-06 | -3.30 |
| 2008-05 | 4.30 |
| 2008-04 | 22.90 |
| 2008-03 | 13.40 |
| 2008-02 | 2.10 |
| 2008-01 | 3.71 |
| 2007-12 | 6.80 |
| 2007-11 | 11.80 |
| 2007-10 | 37.10 |
| 2007-09 | 24.20 |
| 2007-08 | 10.30 |
| 2007-07 | 9.60 |
| 2007-06 | 16.70 |
| 2007-05 | 22.50 |
| 2007-04 | 3.40 |
| 2007-03 | 4.80 |
| 2007-02 | 12.20 |
| 2007-01 | 28.07 |
| 2006-12 | 46.60 |
| 2006-11 | 18.40 |
| 2006-10 | 18.70 |
| 2006-09 | 24.40 |
| 2006-08 | 30.60 |
| 2006-07 | 29.50 |
| 2006-06 | 27.90 |
| 2006-05 | 23.50 |
| 2006-04 | 18.10 |
| 2006-03 | 18.50 |
| 2006-02 | 31.70 |
| 2006-01 | 13.62 |
| 2005-12 | 14.70 |
| 2005-11 | 23.00 |
| 2005-10 | 14.40 |
| 2005-09 | 27.40 |
| 2005-08 | 27.40 |
| 2005-07 | 25.60 |
| 2005-06 | 17.30 |
| 2005-05 | 13.00 |
| 2005-04 | 2.50 |
| 2005-03 | 4.00 |
| 2005-02 | 6.00 |
| 2005-01 | 22.40 |
| 2004-12 | 28.30 |
| 2004-11 | 16.70 |
| 2004-10 | 6.20 |
| 2004-09 | -11.00 |
| 2004-08 | 14.70 |
| 2004-07 | 2.40 |
| 2004-06 | 5.10 |
| 2004-05 | -5.60 |
| 2004-04 | -5.90 |
| 2004-03 | -1.10 |
| 2004-02 | 17.60 |
| 2004-01 | -8.90 |
| 2003-12 | 2.30 |
| 2003-11 | 13.23 |
| 2003-10 | 26.51 |
| 2003-09 | 18.55 |
| 2003-08 | 5.31 |
| 2003-07 | 3.37 |
| 2003-06 | -0.94 |
| 2003-05 | 16.67 |
| 2003-04 | 12.99 |
| 2003-03 | 11.01 |
| 2003-02 | -5.01 |
| 2003-01 | 10.02 |
| 2002-12 | 22.02 |
| 2002-11 | 8.74 |
| 2002-10 | 12.12 |
| 2002-09 | 10.09 |
| 2002-08 | 28.00 |
| 2002-07 | 33.63 |
| 2002-06 | 26.40 |
| 2002-05 | 25.87 |
| 2002-04 | 20.26 |
| 2002-03 | 15.14 |
| 2002-02 | 16.80 |
| 2002-01 | 17.71 |
| 2001-12 | 3.80 |
| 2001-11 | 15.41 |
| 2001-10 | 11.87 |
| 2001-09 | 8.78 |
| 2001-08 | -0.02 |
| 2001-07 | 0.92 |
| 2001-06 | 33.12 |
| 2001-05 | 12.97 |
| 2001-04 | 13.40 |
| 2001-03 | 7.60 |
| 2001-02 | 2.30 |
| 2001-01 | -0.70 |
| 2000-12 | 29.30 |
| 2000-11 | 13.80 |
| 2000-10 | 3.70 |
| 2000-09 | 13.40 |
| 2000-08 | 20.70 |
| 2000-07 | 13.20 |
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