| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.81 | 6.87 | 4.54 |
| 2024 | 3.94 | 9.21 | 3.02 |
| 2023 | 5.38 | 7.34 | 4.46 |
| 2022 | 5.85 | 8.85 | 4.08 |
| 2021 | 9.28 | 12.36 | 6.56 |
| 2020 | 12.12 | 17.28 | 7.37 |
| 2019 | 6.25 | 8.47 | 4.27 |
| 2018 | 6.86 | 9.89 | 4.46 |
| 2017 | 6.86 | 10.01 | 4.42 |
| 2016 | 12.7 | 20.6 | 9.12 |
| 2015 | 21.95 | 67.47 | 10.42 |
| 2014 | 6.38 | 15.29 | 3.59 |
| 2013 | 4.11 | 6.06 | 2.82 |