| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.68 | 3.95 | 3.33 |
| 2024 | 3.19 | 4.05 | 2.35 |
| 2023 | 4.54 | 6.48 | 3.5 |
| 2022 | 6.64 | 7.85 | 5.61 |
| 2021 | 6.85 | 8.18 | 5.39 |
| 2020 | 6.66 | 11.22 | 5.23 |
| 2019 | 5.12 | 7.39 | 3.83 |
| 2018 | 5.64 | 7.77 | 3.75 |
| 2017 | 9.8 | 12.1 | 7.18 |
| 2016 | 11.91 | 13.8 | 9.17 |
| 2015 | 11.73 | 22.17 | 6.64 |
| 2014 | 7.07 | 12.2 | 5.4 |
| 2013 | 7.12 | 10.31 | 5.08 |
| 2012 | 9.69 | 15.88 | 5.57 |