| 序号 | 时间 | 最低 |
|---|---|---|
| 1 | 2012-12-31 | 3.38 |
| 2 | 2013-12-31 | 7.64 |
| 3 | 2014-12-31 | 14.86 |
| 4 | 2015-12-31 | 14.97 |
| 5 | 2016-12-30 | 11.50 |
| 6 | 2017-12-29 | 10.04 |
| 7 | 2018-12-28 | 8.38 |
| 8 | 2019-12-31 | 8.59 |
| 9 | 2020-12-31 | 16.53 |
| 10 | 2021-12-31 | 15.45 |
| 11 | 2022-12-30 | 12.74 |
| 12 | 2023-12-29 | 19.57 |
| 13 | 2024-07-26 | 18.39 |