| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.58 | 5.25 | 3.91 |
| 2024 | 4.35 | 5.96 | 3.25 |
| 2023 | 5.78 | 6.41 | 5.31 |
| 2022 | 5.68 | 7.15 | 4.46 |
| 2021 | 4.77 | 7.6 | 3.95 |
| 2020 | 3.53 | 6.38 | 2.23 |
| 2019 | 2.62 | 3.29 | 2.05 |
| 2018 | 3.24 | 4.59 | 2.03 |
| 2017 | 8.4 | 14.77 | 4.15 |
| 2016 | 16.14 | 21.78 | 11.71 |
| 2015 | 12.8 | 21.58 | 6.44 |
| 2014 | 8.04 | 10.54 | 5.07 |
| 2013 | 3.96 | 5.95 | 2.88 |
| 2012 | 3.47 | 4.7 | 2.87 |