| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.58 | 12.91 | 7.67 |
| 2024 | 7.31 | 12.27 | 4.01 |
| 2023 | 7.87 | 9.42 | 6.39 |
| 2022 | 5.94 | 10.61 | 4.29 |
| 2021 | 4.99 | 6.48 | 4.06 |
| 2020 | 6.63 | 7.76 | 5.34 |
| 2019 | 6.64 | 8.78 | 5.09 |
| 2018 | 6.52 | 9.63 | 4.8 |
| 2017 | 9.67 | 13.53 | 6.8 |
| 2016 | 14.82 | 22.95 | 11.29 |
| 2015 | 18.19 | 33.53 | 11.23 |
| 2014 | 9.3 | 15.18 | 6.06 |
| 2013 | 5.81 | 7.24 | 4.48 |
| 2012 | 7.65 | 10.63 | 4.56 |
| 2011 | 10.83 | 13.86 | 9.36 |