| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.61 | 6.51 | 3.66 |
| 2024 | 3.48 | 4.84 | 2.68 |
| 2023 | 5.37 | 8.33 | 4.09 |
| 2022 | 5.78 | 8.18 | 4.41 |
| 2021 | 5.41 | 6.54 | 4.25 |
| 2020 | 6.68 | 8.69 | 5.39 |
| 2019 | 6.63 | 9.24 | 5.51 |
| 2018 | 9.61 | 13.06 | 6.87 |
| 2017 | 13.52 | 17.78 | 11.2 |
| 2016 | 17.91 | 23.5 | 15.42 |
| 2015 | 21.2 | 38.66 | 9.34 |
| 2014 | 9.96 | 12.92 | 7.51 |
| 2013 | 7.52 | 11.74 | 6.05 |
| 2012 | 5.56 | 6.32 | 4.78 |