| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.39 | 4.02 | 3.15 |
| 2024 | 3.08 | 3.98 | 2.26 |
| 2023 | 4.29 | 5.71 | 3.4 |
| 2022 | 4.77 | 5.9 | 3.42 |
| 2021 | 5.3 | 8.16 | 3.83 |
| 2020 | 4.9 | 6.86 | 3.92 |
| 2019 | 4.39 | 8.72 | 2.47 |
| 2018 | 3.47 | 4.87 | 2.27 |
| 2017 | 5.84 | 7.54 | 4.55 |
| 2016 | 8.3 | 10.25 | 6.83 |
| 2015 | 9.18 | 13.08 | 5.48 |
| 2014 | 5.95 | 7.49 | 4.61 |
| 2013 | 6.49 | 7.46 | 5.7 |
| 2012 | 5.45 | 6.61 | 4.81 |
| 2011 | 8.3 | 14.87 | 5.33 |