| 序号 | 时间（日期） |
|---|---|
| 1 | 2011-12-01 |
| 2 | 2011-11-01 |
| 3 | 2011-10-01 |
| 4 | 2011-09-01 |
| 5 | 2011-08-01 |
| 6 | 2011-07-01 |
| 7 | 2011-06-01 |
| 8 | 2011-05-01 |
| 9 | 2011-04-01 |
| 10 | 2011-03-01 |
| 11 | 2011-02-01 |
| 12 | 2010-12-01 |
| 13 | 2010-11-01 |
| 14 | 2010-10-01 |
| 15 | 2010-09-01 |
| 16 | 2010-08-01 |
| 17 | 2010-07-01 |
| 18 | 2010-06-01 |
| 19 | 2010-05-01 |
| 20 | 2010-04-01 |