| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.49 | 11.08 | 7.13 |
| 2024 | 7.04 | 11.31 | 3.08 |
| 2023 | 4.46 | 6.36 | 3.38 |
| 2022 | 2.81 | 3.52 | 1.62 |
| 2021 | 2.85 | 3.82 | 2.13 |
| 2020 | 4.34 | 5.9 | 3.24 |
| 2019 | 2.39 | 3.84 | 1.81 |
| 2018 | 3.52 | 5.04 | 2.42 |
| 2017 | 4.57 | 5.73 | 3.77 |
| 2016 | 9.35 | 14.71 | 5.39 |
| 2015 | 14.05 | 21.02 | 9.76 |
| 2014 | 17.41 | 25.12 | 11.02 |
| 2013 | 17.35 | 27.13 | 10.31 |
| 2012 | 12.77 | 22.34 | 9.44 |
| 2011 | 19.37 | 23.13 | 16.64 |