| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.38 | 10.56 | 5.54 |
| 2024 | 5.83 | 8.14 | 3.54 |
| 2023 | 6.9 | 8.03 | 5.33 |
| 2022 | 7.59 | 9.48 | 5.43 |
| 2021 | 7.01 | 11.35 | 4.03 |
| 2020 | 5.34 | 6.3 | 4.35 |
| 2019 | 4.05 | 5.86 | 2.21 |
| 2018 | 3.94 | 7.56 | 1.89 |
| 2017 | 8.32 | 11.07 | 7.18 |
| 2016 | 7.91 | 11.81 | 4.4 |
| 2015 | 6.79 | 14.31 | 3.35 |
| 2014 | 3.98 | 4.79 | 2.67 |
| 2013 | 2.25 | 2.76 | 1.94 |
| 2012 | 2 | 2.47 | 1.66 |
| 2011 | 2.65 | 3.22 | 2.17 |