| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.47 | 7.62 | 4.5 |
| 2024 | 4.43 | 6.22 | 2.84 |
| 2023 | 4.83 | 5.59 | 3.75 |
| 2022 | 4.35 | 5.45 | 3.55 |
| 2021 | 5.58 | 7.28 | 4.35 |
| 2020 | 10.45 | 13.99 | 7.04 |
| 2019 | 6.96 | 9.04 | 4.35 |
| 2018 | 6.25 | 9.36 | 4.04 |
| 2017 | 10.89 | 14.41 | 8.14 |
| 2016 | 10.98 | 15.97 | 6.45 |
| 2015 | 10.79 | 21.24 | 6.32 |
| 2014 | 7.07 | 11.02 | 4.57 |
| 2013 | 4.74 | 5.91 | 3.36 |
| 2012 | 3.96 | 4.75 | 3.4 |