| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 7.03 | 8.09 | 6.38 |
| 2025 | 6.22 | 8.64 | 4.54 |
| 2024 | 4.16 | 6.78 | 2.45 |
| 2023 | 4.82 | 5.87 | 4.03 |
| 2022 | 4.42 | 6.3 | 2.88 |
| 2021 | 5.4 | 8.91 | 3.14 |
| 2020 | 5.87 | 7.33 | 3.74 |
| 2019 | 7.07 | 10.21 | 5.36 |
| 2018 | 6.81 | 8.35 | 5.68 |
| 2017 | 11.34 | 17.76 | 6.95 |
| 2016 | 15.43 | 20.82 | 9.94 |
| 2015 | 15.3 | 21.29 | 8.83 |