| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.16 | 4.77 | 3.6 |
| 2024 | 4.41 | 5.44 | 3.58 |
| 2023 | 5.34 | 6.94 | 3.89 |
| 2022 | 5.16 | 7.36 | 2.8 |
| 2021 | 6.37 | 9.67 | 4.65 |
| 2020 | 6.06 | 10.21 | 2.9 |
| 2019 | 2.72 | 3.24 | 2.2 |
| 2018 | 4.58 | 8.53 | 2.21 |
| 2017 | 5.73 | 8.14 | 4.67 |
| 2016 | 5.77 | 7.02 | 4.67 |
| 2015 | 8.08 | 11.67 | 5.48 |
| 2014 | 8.48 | 11.76 | 5.98 |
| 2013 | 7.76 | 10.1 | 6.15 |