| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.62 | 5.27 | 3.77 |
| 2024 | 4.27 | 6.03 | 2.85 |
| 2023 | 6.02 | 8.94 | 3.53 |
| 2022 | 3.56 | 4.76 | 2.65 |
| 2021 | 6.01 | 8.25 | 4.25 |
| 2020 | 11.17 | 16.07 | 6.71 |
| 2019 | 5.15 | 15.92 | 3.36 |
| 2018 | 4.59 | 6.31 | 3.02 |
| 2017 | 8.89 | 14.71 | 5.62 |
| 2016 | 9.79 | 12.98 | 6.85 |
| 2015 | 11.38 | 23.81 | 7 |
| 2014 | 5.73 | 9.05 | 3.97 |
| 2013 | 3.46 | 5.39 | 2.62 |
| 2012 | 3.15 | 4.12 | 2.4 |
| 2011 | 4.64 | 6.23 | 3.33 |