| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 7.83 | 9.64 | 6.51 |
| 2025 | 8.38 | 10.24 | 7.15 |
| 2024 | 8.4 | 10.01 | 7.09 |
| 2023 | 15.83 | 29.21 | 8.91 |
| 2022 | 17.06 | 31.38 | 8.43 |
| 2021 | 5.15 | 8.75 | 1.76 |
| 2020 | 2.75 | 4.63 | 1.62 |
| 2019 | 2.18 | 3.06 | 1.77 |
| 2018 | 3.76 | 5.66 | 2.11 |
| 2017 | 5.9 | 7.78 | 4.37 |
| 2016 | 11.07 | 13.96 | 7.48 |
| 2015 | 13.49 | 24.49 | 7.15 |