| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0.27 | 0.49 | 0.07 |
| 2023 | 0.53 | 0.7 | 0.38 |
| 2022 | 0.46 | 0.61 | 0.36 |
| 2021 | 0.59 | 1.09 | 0.22 |
| 2020 | 0.35 | 0.75 | 0.24 |
| 2019 | 0.59 | 0.77 | 0.48 |
| 2018 | 1.06 | 2.17 | 0.53 |
| 2017 | 16.02 | 29.18 | 2.04 |
| 2016 | 51.4 | 81.47 | 28.21 |
| 2015 | 81.22 | 164.35 | 25.72 |
| 2014 | 11.34 | 30.2 | 6.06 |
| 2013 | 4.92 | 7.86 | 3.28 |
| 2012 | 3.88 | 4.66 | 3.13 |
| 2011 | 7.22 | 10.48 | 3.8 |
| 2010 | 13.05 | 17.57 | 9.73 |