| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.72 | 8.4 | 5.21 |
| 2024 | 4.94 | 8.28 | 3.78 |
| 2023 | 5.45 | 6.7 | 4.57 |
| 2022 | 5.62 | 12.28 | 4 |
| 2021 | 5.5 | 8.91 | 4.28 |
| 2020 | 6.74 | 9.45 | 4.72 |
| 2019 | 5.77 | 10.34 | 3.64 |
| 2018 | 8.71 | 15.7 | 4.39 |
| 2017 | 28.35 | 47.62 | 12.47 |
| 2016 | 20.3 | 48.96 | 10.22 |
| 2015 | 13.1 | 17.17 | 5.33 |
| 2014 | 5.05 | 7.85 | 3.86 |
| 2013 | 4.51 | 5.31 | 4.09 |
| 2012 | 5.03 | 7.48 | 3.75 |
| 2011 | 6.62 | 8.2 | 5.19 |