| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 5.34 | 6.23 | 4.68 |
| 2025 | 5.26 | 5.99 | 4.2 |
| 2024 | 5.8 | 7.81 | 3.81 |
| 2023 | 7.33 | 9.56 | 5.89 |
| 2022 | 6.58 | 9.66 | 5.09 |
| 2021 | 11.13 | 18.67 | 5.58 |
| 2020 | 13.79 | 18.8 | 9.08 |
| 2019 | 9.58 | 12.11 | 6.38 |
| 2018 | 9.59 | 13.29 | 6.21 |
| 2017 | 13.18 | 17.44 | 10.66 |
| 2016 | 18.31 | 20.87 | 15.15 |
| 2015 | 19.69 | 31.18 | 12.5 |