| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.46 | 5.23 | 1.06 |
| 2024 | 2.57 | 5.99 | 1.02 |
| 2023 | 6.82 | 8.46 | 5.14 |
| 2022 | 4.52 | 8.6 | 2.84 |
| 2021 | 4.36 | 5.89 | 3.07 |
| 2020 | 5.44 | 8.08 | 4.02 |
| 2019 | 6.6 | 9.82 | 4.37 |
| 2018 | 5.2 | 7.94 | 4 |
| 2017 | 9.73 | 15.84 | 6.97 |
| 2016 | 13.81 | 22.64 | 11.3 |
| 2015 | 9.28 | 16.88 | 5.03 |
| 2014 | 4.51 | 6.08 | 3.42 |
| 2013 | 3.37 | 4.48 | 2.34 |
| 2012 | 3.11 | 3.92 | 2.38 |