| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.47 | 9.59 | 6.48 |
| 2024 | 5.94 | 9.73 | 3.83 |
| 2023 | 6.86 | 9.42 | 5.34 |
| 2022 | 5.2 | 6.69 | 3.61 |
| 2021 | 5.04 | 7.14 | 3.88 |
| 2020 | 5.92 | 10.64 | 3.29 |
| 2019 | 3.97 | 4.84 | 3.25 |
| 2018 | 3.71 | 4.89 | 2.98 |
| 2017 | 6.12 | 8.18 | 4.39 |
| 2016 | 8.81 | 12.1 | 7.71 |
| 2015 | 9.99 | 18.56 | 6.12 |
| 2014 | 6.3 | 9.93 | 3.72 |
| 2013 | 3.85 | 5.42 | 3.09 |
| 2012 | 3.93 | 4.94 | 2.82 |
| 2011 | 5.64 | 6.81 | 4.46 |