| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 2.52 | 4.9 | 0.86 |
| 2023 | 5.88 | 7.9 | 3.69 |
| 2022 | 5.37 | 8.71 | 3.76 |
| 2021 | 8.25 | 17.22 | 3.53 |
| 2020 | 2.41 | 4.19 | 1.54 |
| 2019 | 7.1 | 19.5 | 1.56 |
| 2018 | 11.05 | 21.59 | 6.91 |
| 2017 | 10.15 | 14.11 | 8.28 |
| 2016 | 17.6 | 29.66 | 12.37 |
| 2015 | 16.72 | 25.73 | 7.6 |
| 2014 | 8.33 | 10.9 | 4.77 |
| 2013 | 3.76 | 5.78 | 2.51 |
| 2012 | 3.35 | 3.93 | 2.5 |
| 2011 | 4.35 | 5.73 | 3.68 |