| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 6.95 | 7.49 | 5.86 |
| 2025 | 4.75 | 7.55 | 2.31 |
| 2024 | 3.82 | 5.71 | 2.27 |
| 2023 | 6.62 | 11.26 | 4.22 |
| 2022 | 5.5 | 8.33 | 4.17 |
| 2021 | 5.96 | 7.39 | 5.16 |
| 2020 | 6.58 | 8.15 | 4.51 |
| 2019 | 4.67 | 5.79 | 3.55 |
| 2018 | 5.95 | 8.3 | 3.54 |
| 2017 | 7.13 | 8.33 | 6.28 |
| 2016 | 10.06 | 12.87 | 8.12 |
| 2015 | 13.8 | 16.89 | 8.83 |