| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.26 | 10.39 | 6.38 |
| 2024 | 5.53 | 9.62 | 4.04 |
| 2023 | 6.97 | 12.68 | 5.78 |
| 2022 | 5.65 | 7.66 | 3.8 |
| 2021 | 3.81 | 7.76 | 2.31 |
| 2020 | 3.35 | 5.23 | 2.25 |
| 2019 | 3.14 | 4.18 | 2.58 |
| 2018 | 4.93 | 8.12 | 3.01 |
| 2017 | 14.7 | 22.74 | 7.03 |
| 2016 | 17.84 | 24.56 | 13.84 |
| 2015 | 17.13 | 30.98 | 10 |
| 2014 | 17.72 | 24.38 | 11.27 |
| 2013 | 9.76 | 26.54 | 4.81 |
| 2012 | 7.01 | 10.96 | 3.66 |
| 2011 | 8.57 | 12.11 | 5.5 |