| 序号 | 时间 | 最低 |
|---|---|---|
| 1 | 2008-12-31 | 1.53 |
| 2 | 2009-12-31 | 3.32 |
| 3 | 2010-12-31 | 6.73 |
| 4 | 2011-12-30 | 6.86 |
| 5 | 2012-12-31 | 6.87 |
| 6 | 2013-12-31 | 6.18 |
| 7 | 2014-12-31 | 5.76 |
| 8 | 2015-12-31 | 7.24 |
| 9 | 2016-12-30 | 7.17 |
| 10 | 2017-12-29 | 9.29 |
| 11 | 2018-12-28 | 7.02 |
| 12 | 2019-12-31 | 7.53 |
| 13 | 2020-12-31 | 10.92 |
| 14 | 2021-12-31 | 11.24 |
| 15 | 2022-12-30 | 8.76 |
| 16 | 2023-12-29 | 10.31 |
| 17 | 2024-07-26 | 7.92 |