| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 5.57 | 8.24 | 4.39 |
| 2023 | 7.03 | 8.46 | 5.3 |
| 2022 | 6.34 | 8.09 | 4.65 |
| 2021 | 7.05 | 8.57 | 5.89 |
| 2020 | 7.77 | 9.97 | 6.35 |
| 2019 | 8.36 | 10.6 | 6.79 |
| 2018 | 8.16 | 11.39 | 5.86 |
| 2017 | 13.56 | 19.73 | 9.16 |
| 2016 | 20.22 | 29.61 | 17.32 |
| 2015 | 26.79 | 57.5 | 14.31 |
| 2014 | 14.29 | 17.82 | 10.89 |
| 2013 | 11.44 | 14.86 | 7.84 |