| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 6.47 | 7.68 | 5.65 |
| 2025 | 5.74 | 8.44 | 4.81 |
| 2024 | 5.19 | 7.05 | 3.95 |
| 2023 | 5.95 | 8.42 | 3.88 |
| 2022 | 4.73 | 10.85 | 3.24 |
| 2021 | 3.82 | 5.79 | 3.01 |
| 2020 | 3.56 | 4.03 | 2.96 |
| 2019 | 3.51 | 4.11 | 3.1 |
| 2018 | 4.38 | 5.56 | 3.02 |
| 2017 | 6.82 | 11.77 | 5.14 |
| 2016 | 8.91 | 12.46 | 7.12 |
| 2015 | 14.16 | 23.67 | 10.36 |