| 序号 | 时间（日期） |
|---|---|
| 1 | 2015-09-01 |
| 2 | 2015-06-01 |
| 3 | 2015-03-01 |
| 4 | 2014-12-01 |
| 5 | 2014-09-01 |
| 6 | 2014-06-01 |
| 7 | 2014-03-01 |
| 8 | 2013-12-01 |
| 9 | 2013-09-01 |
| 10 | 2013-06-01 |
| 11 | 2013-03-01 |
| 12 | 2012-12-01 |
| 13 | 2012-09-01 |
| 14 | 2012-06-01 |
| 15 | 2012-03-01 |
| 16 | 2011-12-01 |
| 17 | 2011-09-01 |
| 18 | 2011-06-01 |
| 19 | 2011-03-01 |
| 20 | 2010-12-01 |