| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.27 | 10.08 | 6.25 |
| 2024 | 7.69 | 10.47 | 5.48 |
| 2023 | 9.95 | 12.8 | 7.03 |
| 2022 | 9.33 | 13.1 | 5.55 |
| 2021 | 8.25 | 13.77 | 4.23 |
| 2020 | 5.54 | 7.32 | 3.95 |
| 2019 | 4.49 | 5.92 | 3.21 |
| 2018 | 4.05 | 5.72 | 3.02 |
| 2017 | 6.82 | 10.22 | 4.99 |
| 2016 | 10.66 | 16.33 | 8.22 |
| 2015 | 13.89 | 24.89 | 5.8 |
| 2014 | 5.33 | 9.46 | 3.41 |
| 2013 | 3.62 | 4.7 | 3.1 |