| 序号 | 时间 | 最低 |
|---|---|---|
| 1 | 2011-12-30 | 5.33 |
| 2 | 2012-12-31 | 5.36 |
| 3 | 2013-12-31 | 5.49 |
| 4 | 2014-12-31 | 5.91 |
| 5 | 2015-12-31 | 7.95 |
| 6 | 2016-12-30 | 7.55 |
| 7 | 2017-12-29 | 7.85 |
| 8 | 2018-12-28 | 5.19 |
| 9 | 2019-12-31 | 6.12 |
| 10 | 2020-12-31 | 6.74 |
| 11 | 2021-12-31 | 7.22 |
| 12 | 2022-12-30 | 5.88 |
| 13 | 2023-12-29 | 6.26 |
| 14 | 2024-07-26 | 5.57 |