| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 6.7 | 10.7 | 3.09 |
| 2022 | 9.67 | 11.93 | 6.7 |
| 2021 | 4.88 | 9.71 | 2.87 |
| 2020 | 4.11 | 6.49 | 1.9 |
| 2019 | 3.11 | 5.65 | 2.04 |
| 2018 | 2.51 | 4.38 | 1.31 |
| 2017 | 2.64 | 3.13 | 2.14 |
| 2016 | 2.6 | 3.44 | 1.38 |
| 2015 | 11.1 | 44.43 | 1.35 |
| 2014 | 10.71 | 26.88 | 5.07 |
| 2013 | 6.21 | 7.44 | 5.28 |
| 2012 | 7.21 | 9.54 | 5.51 |
| 2011 | 10.72 | 12.42 | 7.51 |