| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 5.63 | 6.21 | 4.78 |
| 2025 | 5.39 | 7.2 | 4.09 |
| 2024 | 5.29 | 6.98 | 3.9 |
| 2023 | 10 | 15.24 | 6.6 |
| 2022 | 13.53 | 17.3 | 10.06 |
| 2021 | 22.48 | 34.78 | 16.28 |
| 2020 | 22.59 | 28.57 | 16.57 |
| 2019 | 15.85 | 25.15 | 10.39 |
| 2018 | 12.59 | 15.85 | 9.12 |
| 2017 | 9.55 | 11.99 | 8.46 |
| 2016 | 9.94 | 13.25 | 8.65 |
| 2015 | 14.6 | 23.28 | 9.37 |