| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.58 | 7.83 | 4.92 |
| 2024 | 7.4 | 12.37 | 4.27 |
| 2023 | 7.66 | 13.98 | 3.7 |
| 2022 | 6.4 | 10.43 | 3.54 |
| 2021 | 4.9 | 6.89 | 2.99 |
| 2020 | 4.33 | 6.91 | 2.34 |
| 2019 | 3.37 | 4.46 | 2.67 |
| 2018 | 2.57 | 3.16 | 2.06 |
| 2017 | 4.2 | 5.68 | 2.92 |
| 2016 | 7.03 | 8.37 | 5.04 |
| 2015 | 6.34 | 11.36 | 3.47 |
| 2014 | 5.07 | 6.23 | 3.94 |
| 2013 | 3.89 | 8.52 | 2.71 |
| 2012 | 3.51 | 4.82 | 2.3 |
| 2011 | 6.53 | 10.17 | 4.32 |
| 2010 | 8.31 | 10.64 | 6.51 |