| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.93 | 2.31 | 1.6 |
| 2024 | 1.78 | 2.48 | 1.34 |
| 2023 | 8.5 | 22.7 | 1.99 |
| 2022 | 14.08 | 19.48 | 9.05 |
| 2021 | 10.53 | 15.26 | 8.79 |
| 2020 | 15.23 | 23.6 | 11.34 |
| 2019 | 11.03 | 28.41 | 5.78 |
| 2018 | 7.82 | 15 | 4.24 |
| 2017 | 19.87 | 28.74 | 13.29 |
| 2016 | 15.94 | 25.22 | 9.89 |
| 2015 | 12.28 | 19.66 | 8.33 |
| 2014 | 10.22 | 15 | 7.33 |
| 2013 | 6.34 | 8.36 | 4.35 |
| 2012 | 3.72 | 4.43 | 3.15 |