| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.43 | 9.78 | 6.01 |
| 2024 | 5.59 | 10.47 | 3.39 |
| 2023 | 6.65 | 8.64 | 5.29 |
| 2022 | 6.53 | 8.73 | 4.19 |
| 2021 | 5.49 | 9.52 | 3.96 |
| 2020 | 5.87 | 9.03 | 4.65 |
| 2019 | 4.54 | 7.96 | 2.99 |
| 2018 | 4.9 | 7.66 | 3.03 |
| 2017 | 10.25 | 18.51 | 6.66 |
| 2016 | 22.41 | 32.3 | 14.08 |
| 2015 | 25.07 | 51.49 | 9.35 |
| 2014 | 10.19 | 13.31 | 7.54 |
| 2013 | 8.48 | 11.81 | 5.24 |