| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 13.04 | 23.91 | 6.39 |
| 2023 | 22.97 | 39.56 | 6.16 |
| 2022 | 6.04 | 7.57 | 4.06 |
| 2021 | 5.77 | 7.47 | 5.25 |
| 2020 | 6.21 | 7.34 | 4.84 |
| 2019 | 5.4 | 7.33 | 4.3 |
| 2018 | 6.28 | 10.25 | 4 |
| 2017 | 7.93 | 10.51 | 6.1 |
| 2016 | 10.45 | 13.07 | 6.29 |
| 2015 | 8.9 | 15.06 | 4.17 |
| 2014 | 7.67 | 10.33 | 5.35 |
| 2013 | 4.08 | 6.72 | 2.41 |
| 2012 | 4.45 | 8.54 | 2.38 |
| 2011 | 7.13 | 10.58 | 5.77 |
| 2010 | 10.91 | 16.62 | 7.91 |
| 2009 | 11.31 | 16.36 | 7.13 |