| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 2.55 | 3.63 | 0.95 |
| 2021 | 4.7 | 9.93 | 2.81 |
| 2020 | 6.28 | 16.61 | 2.58 |
| 2019 | 4.39 | 6.05 | 3.09 |
| 2018 | 6.11 | 15.45 | 2.97 |
| 2017 | 13.57 | 17.82 | 10.61 |
| 2016 | 9.45 | 16.16 | 6.65 |
| 2015 | 10.66 | 19.23 | 6.33 |
| 2014 | 6.8 | 9.68 | 5.07 |
| 2013 | 5.53 | 6.75 | 4.49 |
| 2012 | 8.45 | 12.89 | 5.04 |
| 2011 | 20 | 34.21 | 10.74 |
| 2010 | 22.21 | 34.13 | 13.24 |