| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.99 | 14.26 | 7.01 |
| 2024 | 6.06 | 10.37 | 4.08 |
| 2023 | 5.09 | 7.37 | 4.03 |
| 2022 | 4.02 | 4.87 | 3.5 |
| 2021 | 4.89 | 6.09 | 4.11 |
| 2020 | 5.65 | 6.81 | 4.27 |
| 2019 | 4.95 | 6.05 | 3.71 |
| 2018 | 5.15 | 6.91 | 3.81 |
| 2017 | 7.73 | 9.77 | 6.42 |
| 2016 | 8.75 | 11.46 | 6.95 |
| 2015 | 10.9 | 18.3 | 6.85 |
| 2014 | 6.25 | 9.58 | 4.65 |
| 2013 | 4.96 | 5.99 | 4.25 |