| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.22 | 14.4 | 5.51 |
| 2024 | 5.56 | 9.69 | 4.1 |
| 2023 | 6.65 | 8.5 | 5.31 |
| 2022 | 3.71 | 6.25 | 2.34 |
| 2021 | 2.62 | 4.1 | 1.69 |
| 2020 | 2.4 | 3.94 | 1.83 |
| 2019 | 2.57 | 3.16 | 2.07 |
| 2018 | 2.87 | 4.4 | 2.03 |
| 2017 | 5.34 | 6.18 | 4.29 |
| 2016 | 5.48 | 6.5 | 3.75 |
| 2015 | 6.08 | 10.55 | 3.25 |
| 2014 | 3.16 | 4.06 | 2.51 |
| 2013 | 2.7 | 3.62 | 1.64 |
| 2012 | 2.07 | 2.78 | 1.39 |
| 2011 | 2.49 | 2.78 | 2.14 |