| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.46 | 7.46 | 3.8 |
| 2024 | 4.05 | 7.75 | 2.71 |
| 2023 | 4.23 | 5.34 | 3.6 |
| 2022 | 4.13 | 5.22 | 3.38 |
| 2021 | 4.47 | 7.5 | 3.01 |
| 2020 | 3.15 | 4.3 | 2.07 |
| 2019 | 2.59 | 4.84 | 1.95 |
| 2018 | 3.02 | 4.58 | 1.97 |
| 2017 | 5.59 | 7.46 | 4.25 |
| 2016 | 7.49 | 9.61 | 6.27 |
| 2015 | 8.17 | 15.52 | 4.26 |
| 2014 | 8.27 | 10.04 | 6.95 |
| 2013 | 6.75 | 8.43 | 5.48 |
| 2012 | 5.34 | 6.37 | 4.47 |
| 2011 | 8.28 | 10.19 | 6.31 |
| 2010 | 7.78 | 9.92 | 6.19 |