| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 18.49 | 21.58 | 16.42 |
| 2024 | 13.13 | 27.47 | 8.59 |
| 2023 | 14.58 | 20.72 | 10.38 |
| 2022 | 12.75 | 17.51 | 9.87 |
| 2021 | 13.2 | 18.64 | 9.81 |
| 2020 | 16.48 | 25.88 | 12.55 |
| 2019 | 10.05 | 13.41 | 6.45 |
| 2018 | 13.78 | 27.55 | 6.36 |
| 2017 | 29.19 | 41.35 | 21 |
| 2016 | 26.32 | 31.73 | 20.81 |
| 2015 | 20.68 | 32.53 | 11.99 |
| 2014 | 12.85 | 18.66 | 9.59 |
| 2013 | 16.08 | 28.17 | 8.82 |
| 2012 | 24.67 | 30.08 | 17.78 |
| 2011 | 36.09 | 57.39 | 20 |