| 序号 | 时间 | 最低 |
|---|---|---|
| 1 | 2008-12-31 | 0.85 |
| 2 | 2009-12-31 | 1.64 |
| 3 | 2010-12-31 | 1.87 |
| 4 | 2011-12-30 | 2.61 |
| 5 | 2012-12-31 | 1.62 |
| 6 | 2013-12-05 | 2.11 |
| 7 | 2014-12-31 | 4.47 |
| 8 | 2015-12-31 | 6.10 |
| 9 | 2016-12-30 | 4.68 |
| 10 | 2017-12-29 | 4.02 |
| 11 | 2018-12-28 | 3.24 |
| 12 | 2019-12-31 | 3.79 |
| 13 | 2020-12-31 | 3.39 |
| 14 | 2021-12-31 | 4.00 |
| 15 | 2022-12-30 | 3.72 |
| 16 | 2023-12-29 | 3.27 |
| 17 | 2024-07-26 | 2.67 |