| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.59 | 4.94 | 3 |
| 2024 | 3.98 | 7.2 | 3 |
| 2023 | 5.79 | 8.63 | 3.27 |
| 2022 | 4.4 | 7.33 | 2.96 |
| 2021 | 8.43 | 14.09 | 5.94 |
| 2020 | 5.98 | 14.22 | 2.97 |
| 2019 | 3.23 | 4.39 | 2.63 |
| 2018 | 4.93 | 9.92 | 2.51 |
| 2017 | 8.25 | 9.92 | 6.44 |
| 2016 | 5.12 | 7.02 | 3.95 |
| 2015 | 5.48 | 9.61 | 3.69 |
| 2014 | 3.51 | 4.52 | 2.76 |
| 2013 | 2.38 | 3.41 | 1.8 |
| 2012 | 2.08 | 2.46 | 1.68 |
| 2011 | 2.7 | 2.7 | 2.7 |