| 年月 | 单位：万辆 |
| 2008-12 | 1.96 |
| 2008-11 | 2.30 |
| 2008-10 | 2.26 |
| 2008-09 | 2.18 |
| 2008-08 | 1.68 |
| 2008-07 | 1.95 |
| 2008-06 | 2.41 |
| 2008-05 | 2.46 |
| 2008-04 | 2.57 |
| 2008-03 | 2.39 |
| 2008-02 | 1.79 |
| 2008-01 | 2.47 |
| 2007-12 | 2.68 |
| 2007-11 | 2.68 |
| 2007-10 | 2.61 |
| 2007-09 | 2.57 |
| 2007-08 | 2.19 |
| 2007-07 | 2.21 |
| 2007-06 | 2.23 |
| 2007-05 | 2.12 |
| 2007-04 | 2.08 |
| 2007-03 | 1.69 |
| 2007-02 | 1.46 |
| 2007-01 | 1.66 |
| 2006-12 | 1.36 |
| 2006-11 | 1.29 |
| 2006-10 | 1.22 |
| 2006-09 | 1.27 |
| 2006-08 | 1.17 |
| 2006-07 | 0.94 |
| 2006-06 | 1.04 |
| 2006-05 | 1.17 |
| 2006-04 | 1.38 |
| 2006-03 | 1.60 |
| 2006-02 | 0.92 |
| 2005-12 | 0.75 |
| 2005-11 | 0.93 |
| 2005-10 | 0.70 |
| 2005-09 | 0.74 |
| 2005-08 | 0.77 |
| 2005-07 | 0.75 |
| 2005-06 | 0.78 |
| 2005-05 | 0.57 |
| 2005-04 | 0.71 |
| 2005-03 | 0.56 |
| 2005-02 | 0.48 |
| 2005-01 | 0.63 |
| 2004-12 | 0.41 |
| 2004-11 | 0.43 |
| 2004-10 | 0.36 |
| 2004-09 | 0.43 |
| 2004-08 | 0.38 |
| 2004-07 | 0.34 |
| 2004-06 | 0.47 |
| 2004-05 | 0.51 |
| 2004-04 | 0.82 |
| 2004-03 | 0.60 |
| 2004-02 | 0.59 |
| 2004-01 | 0.25 |
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