| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.27 | 12.72 | 7.29 |
| 2024 | 4.57 | 12.03 | 2.61 |
| 2023 | 4.49 | 6.21 | 3.54 |
| 2022 | 5.79 | 9.48 | 4.45 |
| 2021 | 9.42 | 14.91 | 5.41 |
| 2020 | 25.85 | 34.02 | 14.66 |
| 2019 | 17.48 | 25.23 | 5.96 |
| 2018 | 8.46 | 12.93 | 5.97 |
| 2017 | 14.34 | 21.68 | 10.25 |
| 2016 | 25.18 | 28.56 | 19.82 |
| 2015 | 27.35 | 58.46 | 15.35 |
| 2014 | 15.67 | 33.45 | 7.43 |
| 2013 | 9.33 | 13.6 | 6.14 |
| 2012 | 5.68 | 6.59 | 5.02 |