| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.93 | 13.12 | 5.55 |
| 2024 | 5.37 | 8.06 | 3.95 |
| 2023 | 7.49 | 11.83 | 5.88 |
| 2022 | 6.58 | 12.85 | 4.2 |
| 2021 | 8.05 | 11.71 | 5.58 |
| 2020 | 5.52 | 9.21 | 3.9 |
| 2019 | 5.31 | 6.83 | 4.46 |
| 2018 | 6.23 | 8.65 | 4.36 |
| 2017 | 12.02 | 16.94 | 8.25 |
| 2016 | 14.36 | 18.22 | 9.09 |
| 2015 | 15.99 | 21.54 | 6.87 |
| 2014 | 7.76 | 10.33 | 6.22 |
| 2013 | 5.54 | 9.14 | 4.43 |
| 2012 | 5.25 | 6.48 | 4.32 |