| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | -0.27 | |
| 2024 | 0 | -1.76 | |
| 2023 | 27.28 | 36.7 | 22.46 |
| 2022 | 0 | -1.59 | |
| 2021 | 11.61 | 14.07 | 9.82 |
| 2020 | 7.16 | 20.31 | 0.96 |
| 2019 | 1.71 | 3.07 | 1.1 |
| 2018 | 2.65 | 3.51 | 1.65 |
| 2017 | 3.05 | 3.57 | 2.71 |
| 2016 | 3.37 | 3.97 | 2.84 |
| 2015 | 3.66 | 6.8 | 2.58 |
| 2014 | 4.87 | 11.9 | 2.43 |
| 2013 | 2.51 | 2.87 | 2.17 |
| 2012 | 3.22 | 4.4 | 2.14 |
| 2011 | 4.33 | 5.65 | 3.07 |