| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.63 | 3.84 | 3.32 |
| 2024 | 4.19 | 5.76 | 3.01 |
| 2023 | 6.69 | 7.5 | 5.47 |
| 2022 | 7.34 | 10.05 | 5.59 |
| 2021 | 8.67 | 13.38 | 5.73 |
| 2020 | 4.77 | 11.74 | 3.29 |
| 2019 | 4.24 | 5.35 | 3.53 |
| 2018 | 4.33 | 5.38 | 3.61 |
| 2017 | 5.94 | 6.85 | 5.01 |
| 2016 | 6.4 | 7.8 | 5.2 |
| 2015 | 8.17 | 13.68 | 5.76 |
| 2014 | 5.63 | 7.2 | 4.76 |
| 2013 | 7.35 | 9.99 | 5.51 |
| 2012 | 10.05 | 12.24 | 7.51 |