| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.96 | 6.86 | 5.29 |
| 2024 | 5.17 | 6.56 | 3.78 |
| 2023 | 9.19 | 12.66 | 6.18 |
| 2022 | 8.41 | 12.72 | 5.6 |
| 2021 | 20.5 | 35.96 | 12.09 |
| 2020 | 12.8 | 27.09 | 6.3 |
| 2019 | 4.83 | 7.76 | 2.52 |
| 2018 | 4.15 | 6.11 | 2.27 |
| 2017 | 11.58 | 24.22 | 5.22 |
| 2016 | 22.61 | 31.95 | 16.5 |
| 2015 | 33.79 | 98.89 | 9.72 |
| 2014 | 5.95 | 11.77 | 3.68 |
| 2013 | 4.26 | 6.05 | 3.27 |
| 2012 | 3.56 | 4.89 | 2.19 |