| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.87 | 8.83 | 6.18 |
| 2024 | 7.09 | 11.38 | 2.67 |
| 2023 | 4.35 | 5.08 | 3.59 |
| 2022 | 4.99 | 6.25 | 3.89 |
| 2021 | 5.41 | 8.1 | 4.31 |
| 2020 | 4.43 | 6.53 | 2.85 |
| 2019 | 3.92 | 5.89 | 2.84 |
| 2018 | 8.84 | 13.62 | 4.21 |
| 2017 | 10.77 | 15.76 | 6.14 |
| 2016 | 8.93 | 12.16 | 6.44 |
| 2015 | 9.07 | 15.32 | 5.62 |
| 2014 | 6.44 | 7.98 | 5.26 |
| 2013 | 4.01 | 5.86 | 2.82 |
| 2012 | 4.21 | 5.8 | 2.86 |
| 2011 | 7.46 | 12.4 | 4.52 |