| 年月 | 单位：% |
| 2008-12 | -4.00 |
| 2008-11 | 2.10 |
| 2008-10 | 7.20 |
| 2008-09 | 5.10 |
| 2008-08 | 7.30 |
| 2008-07 | 6.30 |
| 2008-06 | 5.60 |
| 2008-05 | 6.90 |
| 2008-04 | 12.40 |
| 2008-03 | 7.50 |
| 2008-02 | 5.40 |
| 2008-01 | 3.92 |
| 2007-12 | 3.00 |
| 2007-11 | 2.60 |
| 2007-10 | 4.50 |
| 2007-09 | 6.20 |
| 2007-08 | 4.80 |
| 2007-07 | 7.50 |
| 2007-06 | 6.40 |
| 2007-05 | 6.40 |
| 2007-04 | 5.80 |
| 2007-03 | 12.30 |
| 2007-02 | 1.40 |
| 2007-01 | 9.31 |
| 2006-12 | 37.40 |
| 2006-11 | 41.30 |
| 2006-10 | 41.40 |
| 2006-09 | 43.70 |
| 2006-08 | 46.20 |
| 2006-07 | 46.00 |
| 2006-06 | 46.00 |
| 2006-05 | 35.20 |
| 2006-04 | 27.00 |
| 2006-03 | 29.20 |
| 2006-02 | 38.10 |
| 2006-01 | 43.03 |
| 2005-12 | -7.80 |
| 2005-11 | -7.00 |
| 2005-10 | -8.30 |
| 2005-09 | -12.00 |
| 2005-08 | -12.70 |
| 2005-07 | -11.70 |
| 2005-06 | -9.70 |
| 2005-05 | -4.60 |
| 2005-04 | -1.30 |
| 2005-03 | -0.20 |
| 2005-02 | 19.70 |
| 2005-01 | -2.90 |
| 2004-12 | 12.90 |
| 2004-11 | 11.30 |
| 2004-10 | 11.80 |
| 2004-09 | 15.10 |
| 2004-08 | 17.10 |
| 2004-07 | 18.30 |
| 2004-06 | 13.90 |
| 2004-05 | 11.40 |
| 2004-04 | 10.00 |
| 2004-03 | 12.50 |
| 2004-02 | 13.60 |
| 2004-01 | 13.60 |
| 2003-12 | 17.77 |
| 2003-11 | 19.07 |
| 2003-10 | 20.12 |
| 2003-09 | 21.83 |
| 2003-08 | 28.06 |
| 2003-07 | 30.16 |
| 2003-06 | 35.39 |
| 2003-05 | 39.77 |
| 2003-04 | 42.86 |
| 2003-03 | 36.31 |
| 2003-02 | 31.12 |
| 2003-01 | 19.53 |
| 2002-12 | 11.88 |
| 2002-11 | 8.90 |
| 2002-10 | 7.52 |
| 2002-09 | 4.30 |
| 2002-08 | -3.62 |
| 2002-07 | -7.41 |
| 2002-06 | -13.01 |
| 2002-05 | -14.39 |
| 2002-04 | -15.60 |
| 2002-03 | -14.76 |
| 2002-02 | -9.51 |
| 2002-01 | 37.63 |
| 2001-12 | -6.96 |
| 2001-11 | 21.03 |
| 2001-10 | 21.57 |
| 2001-09 | 6.75 |
| 2001-08 | 5.95 |
| 2001-07 | 5.69 |
| 2001-06 | 8.91 |
| 2001-05 | 8.10 |
| 2001-04 | 10.30 |
| 2001-03 | 13.20 |
| 2001-02 | 7.70 |
| 2001-01 | 7.20 |
| 2000-12 | 104.00 |
| 2000-11 | 105.80 |
| 2000-10 | 110.10 |
| 2000-09 | 109.80 |
| 2000-08 | 117.00 |
| 2000-07 | 122.60 |
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