| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.92 | 4.22 | 2.57 |
| 2024 | 3.5 | 6.31 | 2.63 |
| 2023 | 5.13 | 7.56 | 3.25 |
| 2022 | 4.17 | 7.2 | 2.91 |
| 2021 | 7.93 | 12.15 | 6.13 |
| 2020 | 5.14 | 12.26 | 2.68 |
| 2019 | 2.95 | 4.02 | 2.41 |
| 2018 | 4.41 | 8.91 | 2.22 |
| 2017 | 7.44 | 8.97 | 5.71 |
| 2016 | 4.41 | 6.22 | 3.3 |
| 2015 | 4.65 | 8.06 | 3.24 |
| 2014 | 3 | 4.04 | 2.33 |
| 2013 | 1.78 | 2.74 | 1.28 |
| 2012 | 1.49 | 1.75 | 1.21 |
| 2011 | 6.62 | 6.62 | 6.62 |