| 序号 | 时间 | 最低 |
|---|---|---|
| 1 | 2012-12-31 | 3.39 |
| 2 | 2013-12-31 | 4.19 |
| 3 | 2014-12-31 | 6.07 |
| 4 | 2015-12-31 | 8.26 |
| 5 | 2016-12-30 | 9.45 |
| 6 | 2017-12-20 | 7.75 |
| 7 | 2018-12-28 | 19.80 |
| 8 | 2019-12-31 | 16.80 |
| 9 | 2020-12-31 | 14.81 |
| 10 | 2021-12-31 | 11.49 |
| 11 | 2022-12-30 | 6.30 |
| 12 | 2023-12-29 | 6.50 |
| 13 | 2024-07-26 | 6.09 |