| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.37 | 9.45 | 7.25 |
| 2024 | 7.37 | 11.36 | 5.3 |
| 2023 | 9.98 | 12.49 | 8.28 |
| 2022 | 8.62 | 12.22 | 6.11 |
| 2021 | 9.06 | 16.19 | 5.98 |
| 2020 | 14.33 | 21.02 | 8.27 |
| 2019 | 29.88 | 41.34 | 16.95 |
| 2018 | 26.78 | 33.19 | 18.72 |
| 2017 | 14.51 | 23.19 | 11.12 |
| 2016 | 17.34 | 22.97 | 13.24 |
| 2015 | 14.31 | 26.99 | 6.69 |
| 2014 | 6.63 | 8.42 | 4.81 |
| 2013 | 5.56 | 7.1 | 3.96 |
| 2012 | 3.97 | 5.05 | 2.93 |
| 2011 | 6.88 | 10.4 | 4.41 |
| 2010 | 9.22 | 11.82 | 6.6 |
| 2009 | 6.7 | 11.91 | 5.02 |