| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.95 | 7.06 | 4.81 |
| 2024 | 5.57 | 7.37 | 3.36 |
| 2023 | 7.34 | 9.13 | 6.15 |
| 2022 | 6.75 | 9.17 | 3.47 |
| 2021 | 6.08 | 7.67 | 3.84 |
| 2020 | 5.54 | 12.58 | 2.2 |
| 2019 | 2.75 | 3.91 | 2.1 |
| 2018 | 3.91 | 6.17 | 2.1 |
| 2017 | 7.72 | 11.18 | 5.51 |
| 2016 | 15.54 | 22.75 | 9.79 |
| 2015 | 10.38 | 18.7 | 6.13 |
| 2014 | 6.25 | 8.35 | 4.07 |
| 2013 | 4.7 | 5.97 | 3.64 |
| 2012 | 6.08 | 9.76 | 3.04 |
| 2011 | 10.69 | 13.56 | 7.24 |