| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 17.51 | 28.61 | 10.35 |
| 2024 | 9.25 | 14.63 | 6.43 |
| 2023 | 11.78 | 14.14 | 9.68 |
| 2022 | 9.38 | 14.53 | 6.66 |
| 2021 | 6.65 | 14.02 | 4.53 |
| 2020 | 6.48 | 9.02 | 4.63 |
| 2019 | 6.59 | 8.81 | 4.91 |
| 2018 | 6.47 | 9.01 | 4.71 |
| 2017 | 12.36 | 16.69 | 8.23 |
| 2016 | 19.8 | 26.07 | 15.14 |
| 2015 | 17.18 | 26.67 | 9.33 |
| 2014 | 7.96 | 11.32 | 4.14 |
| 2013 | 4.22 | 5.41 | 3.31 |
| 2012 | 4.01 | 5.57 | 3.04 |
| 2011 | 8.81 | 11.02 | 5.12 |