| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.68 | 8.93 | 6.26 |
| 2024 | 7.85 | 12.44 | 5.34 |
| 2023 | 5.94 | 12.84 | 2.39 |
| 2022 | 3.12 | 4.67 | 2.2 |
| 2021 | 3.38 | 4.47 | 2.82 |
| 2020 | 4.43 | 6.35 | 2.62 |
| 2019 | 3.05 | 4.12 | 2.67 |
| 2018 | 3.57 | 6.02 | 2.19 |
| 2017 | 6.24 | 8.89 | 4.6 |
| 2016 | 10.57 | 16.56 | 7.99 |
| 2015 | 11.26 | 20.72 | 5.37 |
| 2014 | 7.22 | 9.26 | 5.45 |
| 2013 | 5.99 | 9.61 | 4.53 |
| 2012 | 4.19 | 5.24 | 3.47 |
| 2011 | 4.23 | 4.75 | 3.65 |