| 年月 | 单位：万户 |
| 2008-09 | -19.50 |
| 2008-08 | 43.10 |
| 2008-07 | 82.90 |
| 2008-06 | 124.20 |
| 2008-05 | 122.60 |
| 2008-04 | 117.10 |
| 2008-03 | 88.20 |
| 2008-02 | 58.10 |
| 2008-01 | 30.30 |
| 2007-12 | 460.40 |
| 2007-11 | 427.70 |
| 2007-10 | 397.50 |
| 2007-09 | 361.70 |
| 2007-08 | 326.30 |
| 2007-07 | 291.50 |
| 2007-06 | 256.90 |
| 2007-05 | 216.50 |
| 2007-04 | 171.40 |
| 2007-03 | 123.10 |
| 2007-02 | 75.90 |
| 2007-01 | 36.70 |
| 2006-12 | 377.10 |
| 2006-11 | 341.00 |
| 2006-10 | 303.70 |
| 2006-09 | 267.60 |
| 2006-08 | 234.00 |
| 2006-07 | 205.60 |
| 2006-06 | 181.20 |
| 2006-05 | 151.10 |
| 2006-04 | 120.00 |
| 2006-03 | 91.40 |
| 2006-02 | 59.30 |
| 2006-01 | 31.60 |
| 2005-12 | 490.80 |
| 2005-11 | 460.30 |
| 2005-10 | 435.90 |
| 2005-09 | 409.70 |
| 2005-08 | 384.40 |
| 2005-07 | 350.70 |
| 2005-06 | 310.60 |
| 2005-05 | 265.60 |
| 2005-04 | 211.40 |
| 2005-03 | 161.80 |
| 2005-02 | 105.70 |
| 2005-01 | 55.40 |
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