| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 18.25 | 22.37 | 12.39 |
| 2024 | 10.05 | 24.11 | 5.37 |
| 2023 | 7.81 | 12.48 | 2.78 |
| 2022 | 2.95 | 5.42 | 1.23 |
| 2021 | 2.22 | 3.99 | 1.1 |
| 2020 | 4.43 | 5.8 | 3.21 |
| 2019 | 4.11 | 5.12 | 3.23 |
| 2018 | 3.98 | 5.66 | 2.82 |
| 2017 | 6.79 | 11.22 | 4.08 |
| 2016 | 6.85 | 9.31 | 5.9 |
| 2015 | 9.11 | 20 | 5.43 |
| 2014 | 6.92 | 9.33 | 4.79 |
| 2013 | 5.59 | 8.8 | 4.23 |
| 2012 | 5.32 | 7.13 | 3.73 |
| 2011 | 9.12 | 13.32 | 5.94 |