| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.34 | 11.94 | 6.25 |
| 2024 | 7.11 | 10.55 | 4.59 |
| 2023 | 11.61 | 17.93 | 6.81 |
| 2022 | 10.9 | 19.1 | 6.94 |
| 2021 | 13.86 | 24.6 | 7.78 |
| 2020 | 10.38 | 13.07 | 8.36 |
| 2019 | 8.99 | 12.07 | 6.12 |
| 2018 | 7.97 | 13.38 | 4.6 |
| 2017 | 13.49 | 18.25 | 11.07 |
| 2016 | 15.94 | 19.83 | 9.86 |
| 2015 | 16.32 | 35.1 | 8.41 |
| 2014 | 10.17 | 12.73 | 6.9 |
| 2013 | 6.46 | 7.52 | 5.69 |
| 2012 | 6.71 | 8.47 | 5.6 |
| 2011 | 9.04 | 10.9 | 7.44 |