| 序号 | 时间 | 最低 |
|---|---|---|
| 1 | 2012-12-31 | 6.55 |
| 2 | 2013-12-31 | 7.59 |
| 3 | 2014-12-31 | 14.46 |
| 4 | 2015-12-31 | 13.83 |
| 5 | 2016-12-30 | 13.15 |
| 6 | 2017-12-29 | 9.91 |
| 7 | 2018-12-28 | 5.29 |
| 8 | 2019-12-31 | 6.61 |
| 9 | 2020-12-31 | 15.63 |
| 10 | 2021-12-31 | 11.88 |
| 11 | 2022-12-30 | 8.01 |
| 12 | 2023-12-29 | 15.08 |
| 13 | 2024-07-26 | 18.08 |