| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.11 | 6.79 | 5.61 |
| 2024 | 12.75 | 22.33 | 6.3 |
| 2023 | 23.98 | 28.31 | 20.16 |
| 2022 | 12.06 | 19.28 | 8.66 |
| 2021 | 6.69 | 9.22 | 4.74 |
| 2020 | 11.73 | 20.1 | 7.32 |
| 2019 | 8.15 | 13.86 | 5.89 |
| 2018 | 10.2 | 13.27 | 6.88 |
| 2017 | 14.09 | 18.11 | 10.04 |
| 2016 | 22.51 | 35.49 | 17 |
| 2015 | 22.71 | 41.7 | 11.07 |
| 2014 | 11.78 | 14.94 | 9.15 |
| 2013 | 9.36 | 15.64 | 4.17 |
| 2012 | 5.87 | 9.22 | 3.32 |
| 2011 | 8.82 | 12.69 | 6.32 |