| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 21.39 | 24.56 | 19 |
| 2024 | 13.52 | 26.69 | 7.57 |
| 2023 | 16.04 | 24.57 | 10 |
| 2022 | 28.01 | 40.5 | 22.63 |
| 2021 | 28.31 | 50.17 | 20.04 |
| 2020 | 10.91 | 22.26 | 4.95 |
| 2019 | 0.14 | 0.26 | 0.06 |
| 2018 | 0.26 | 0.37 | 0.11 |
| 2017 | 0.32 | 0.41 | 0.25 |
| 2016 | 0.33 | 0.41 | 0.27 |
| 2015 | 0.47 | 0.67 | 0.21 |
| 2014 | 0.17 | 0.22 | 0.1 |
| 2013 | 0.16 | 0.28 | 0.11 |
| 2012 | 0.33 | 0.43 | 0.2 |
| 2011 | 0.77 | 1.68 | 0.3 |
| 2010 | 1.67 | 2.06 | 1.11 |
| 2009 | 0.93 | 1.33 | 0.64 |