| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | -0.9 | |
| 2021 | 14.56 | 63.84 | 2.27 |
| 2020 | 2.4 | 7.53 | 0.33 |
| 2019 | 0.74 | 1.08 | 0.54 |
| 2018 | 1.24 | 2.63 | 0.75 |
| 2017 | 3.37 | 6.62 | 1.67 |
| 2016 | 4.05 | 7.38 | 2.72 |
| 2015 | 4.5 | 8.69 | 2.55 |
| 2014 | 2.58 | 3.61 | 1.89 |
| 2013 | 2.19 | 2.72 | 1.81 |
| 2012 | 3.2 | 4.33 | 2.03 |
| 2011 | 4.87 | 5.97 | 3.6 |
| 2010 | 4.6 | 14.97 | 2.53 |