| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.94 | 4.77 | 3.49 |
| 2024 | 3.68 | 4.57 | 2.86 |
| 2023 | 4.8 | 6.6 | 3.51 |
| 2022 | 6.76 | 8.49 | 5.75 |
| 2021 | 8.91 | 12.15 | 6.85 |
| 2020 | 8.01 | 11.34 | 5.73 |
| 2019 | 5.84 | 6.77 | 4.7 |
| 2018 | 5.23 | 6.6 | 4 |
| 2017 | 4.83 | 5.81 | 3.93 |
| 2016 | 4.6 | 5.74 | 3.67 |
| 2015 | 4.6 | 6.84 | 3.08 |
| 2014 | 3.05 | 4.01 | 2.58 |
| 2013 | 4.19 | 5.1 | 3.16 |
| 2012 | 4.69 | 5.69 | 3.91 |
| 2011 | 4.14 | 4.77 | 3.5 |
| 2010 | 4.22 | 4.6 | 3.77 |