| 序号 | 时间 | 最低 |
|---|---|---|
| 1 | 2008-12-31 | 4.94 |
| 2 | 2009-12-31 | 5.07 |
| 3 | 2010-12-31 | 5.61 |
| 4 | 2011-12-30 | 4.56 |
| 5 | 2012-12-31 | 3.08 |
| 6 | 2013-12-31 | 2.71 |
| 7 | 2014-12-31 | 3.12 |
| 8 | 2015-12-31 | 7.92 |
| 9 | 2016-08-30 | 6.89 |
| 10 | 2017-12-29 | 6.27 |
| 11 | 2018-12-28 | 4.64 |
| 12 | 2019-12-31 | 4.53 |
| 13 | 2020-12-31 | 4.15 |
| 14 | 2021-12-31 | 3.56 |
| 15 | 2022-12-30 | 3.60 |
| 16 | 2023-12-29 | 3.92 |
| 17 | 2024-07-26 | 3.42 |