| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 7.69 | 8.73 | 6.64 |
| 2025 | 6.04 | 8.13 | 4.66 |
| 2024 | 4.54 | 7.56 | 3.43 |
| 2023 | 5.85 | 7.47 | 4.84 |
| 2022 | 6.09 | 8.73 | 3.55 |
| 2021 | 4.73 | 8.89 | 3.38 |
| 2020 | 4.72 | 6.13 | 3.8 |
| 2019 | 4.23 | 5.41 | 3.51 |
| 2018 | 5.86 | 11.83 | 3.57 |
| 2017 | 14.34 | 21.56 | 10.13 |
| 2016 | 17.29 | 24.31 | 10.21 |
| 2015 | 16.48 | 23.56 | 10.62 |