| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.63 | 10.57 | 7.07 |
| 2024 | 5.19 | 10.19 | 3.51 |
| 2023 | 5.66 | 7.17 | 4.83 |
| 2022 | 5.13 | 7.2 | 3.98 |
| 2021 | 6.02 | 8.8 | 5.02 |
| 2020 | 7.54 | 10.57 | 5.15 |
| 2019 | 5.32 | 8.02 | 3.94 |
| 2018 | 5.81 | 8.7 | 3.86 |
| 2017 | 7.08 | 10.41 | 5.14 |
| 2016 | 9.81 | 13.37 | 6.82 |
| 2015 | 7.09 | 14.15 | 3.52 |
| 2014 | 3.57 | 5.12 | 2.63 |
| 2013 | 2.19 | 2.99 | 1.75 |
| 2012 | 2.09 | 2.93 | 1.54 |