| 年月 | 单位：亿元 |
| 2008-12 | 11.00 |
| 2008-11 | 9.80 |
| 2008-10 | 12.40 |
| 2008-09 | 11.60 |
| 2008-08 | 12.20 |
| 2008-07 | 13.50 |
| 2008-06 | 12.80 |
| 2008-05 | 12.10 |
| 2008-04 | 9.80 |
| 2008-03 | 9.90 |
| 2008-02 | 6.70 |
| 2008-01 | 10.80 |
| 2007-12 | 9.80 |
| 2007-11 | 10.00 |
| 2007-10 | 8.70 |
| 2007-09 | 8.10 |
| 2007-08 | 8.80 |
| 2007-07 | 11.40 |
| 2007-06 | 9.40 |
| 2007-05 | 9.30 |
| 2007-04 | 8.60 |
| 2007-03 | 8.90 |
| 2007-02 | 4.60 |
| 2007-01 | 6.90 |
| 2006-12 | 7.90 |
| 2006-11 | 8.70 |
| 2006-10 | 8.00 |
| 2006-09 | 8.10 |
| 2006-08 | 7.50 |
| 2006-07 | 8.30 |
| 2006-06 | 9.70 |
| 2006-05 | 8.70 |
| 2006-04 | 8.20 |
| 2006-03 | 8.30 |
| 2006-02 | 5.40 |
| 2006-01 | 5.60 |
| 2005-12 | 17.50 |
| 2005-11 | 6.40 |
| 2005-10 | 7.60 |
| 2005-09 | 8.00 |
| 2005-08 | 8.20 |
| 2005-07 | 9.00 |
| 2005-06 | 8.60 |
| 2005-05 | 7.50 |
| 2005-04 | 8.10 |
| 2005-03 | 6.20 |
| 2005-02 | 4.70 |
| 2005-01 | 7.00 |
| 2004-12 | 3.10 |
| 2004-11 | 3.80 |
| 2004-10 | 3.10 |
| 2004-09 | 3.30 |
| 2004-08 | 3.30 |
| 2004-07 | 2.50 |
| 2004-06 | 3.50 |
| 2004-05 | 2.60 |
| 2004-04 | 2.90 |
| 2004-03 | 3.00 |
| 2004-02 | 2.40 |
| 2004-01 | 2.20 |
| 2003-12 | 2.60 |
| 2003-11 | 2.70 |
| 2003-10 | 2.50 |
| 2003-09 | 2.40 |
| 2003-08 | 2.00 |
| 2003-07 | 2.40 |
| 2003-06 | 2.20 |
| 2003-05 | 1.90 |
| 2003-04 | 1.90 |
| 2003-03 | 2.10 |
| 2003-02 | 2.40 |
| 2003-01 | 2.00 |
| 2002-12 | 3.00 |
| 2002-11 | 2.00 |
| 2002-10 | 2.40 |
| 2002-09 | 2.10 |
| 2002-08 | 1.90 |
| 2002-07 | 2.10 |
| 2002-06 | 2.00 |
| 2002-05 | 1.50 |
| 2002-04 | 1.40 |
| 2002-03 | 1.30 |
| 2002-02 | 1.00 |
| 2002-01 | 1.70 |
| 2001-12 | 2.10 |
| 2001-11 | 1.60 |
| 2001-10 | 1.50 |
| 2001-09 | 1.10 |
| 2001-08 | 0.90 |
| 2001-07 | 1.30 |
| 2001-06 | 1.50 |
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