| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.08 | 3.52 | 2.77 |
| 2024 | 3.01 | 3.43 | 2.53 |
| 2023 | 3.79 | 4.41 | 3.34 |
| 2022 | 4.16 | 5.37 | 3.55 |
| 2021 | 5.19 | 7.15 | 3.93 |
| 2020 | 5.74 | 9.87 | 4.4 |
| 2019 | 5.49 | 6.72 | 4.86 |
| 2018 | 6.32 | 8.42 | 4.77 |
| 2017 | 10.12 | 14.22 | 7.62 |
| 2016 | 9.19 | 15.06 | 6.85 |
| 2015 | 8.68 | 13.92 | 6.29 |
| 2014 | 6.36 | 7.48 | 5.34 |
| 2013 | 5.73 | 7.09 | 4.64 |
| 2012 | 5.34 | 6.57 | 4.11 |
| 2011 | 7.29 | 9.5 | 5.62 |
| 2010 | 9.5 | 11.44 | 7.91 |