| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.81 | 7.69 | 6.01 |
| 2024 | 7.01 | 9.85 | 5.04 |
| 2023 | 8.59 | 12.93 | 4.99 |
| 2022 | 3.82 | 5.74 | 2.86 |
| 2021 | 5.28 | 6.96 | 4.08 |
| 2020 | 7.18 | 9.77 | 5.8 |
| 2019 | 7.38 | 12.41 | 2.89 |
| 2018 | 3.68 | 4.9 | 2.44 |
| 2017 | 5.86 | 7.32 | 4.36 |
| 2016 | 7.49 | 8.79 | 6.02 |
| 2015 | 11.28 | 17.33 | 6.62 |
| 2014 | 10.02 | 12.55 | 7.4 |
| 2013 | 9.54 | 12.8 | 4.99 |