| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 4.73 | 5.27 | 4.24 |
| 2025 | 5.68 | 6.76 | 4.8 |
| 2024 | 5.56 | 7.41 | 4.66 |
| 2023 | 5.05 | 6.31 | 3.77 |
| 2022 | 4.11 | 5.16 | 3.6 |
| 2021 | 5.77 | 7.32 | 4.84 |
| 2020 | 7.54 | 9.69 | 5.29 |
| 2019 | 13.03 | 18.34 | 8.25 |
| 2018 | 8.64 | 11.19 | 6.32 |
| 2017 | 10.48 | 11.76 | 8.58 |
| 2016 | 7.73 | 12.22 | 5.2 |
| 2015 | 7.27 | 8.76 | 5.98 |