| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.87 | 5.04 | 4.6 |
| 2024 | 4.86 | 7.13 | 3.65 |
| 2023 | 4.09 | 4.74 | 3.24 |
| 2022 | 3.09 | 3.67 | 2.19 |
| 2021 | 3.23 | 3.97 | 2.33 |
| 2020 | 3.73 | 4.51 | 3.17 |
| 2019 | 8.83 | 12.76 | 3.5 |
| 2018 | 7.67 | 10.42 | 5.33 |
| 2017 | 9.22 | 11 | 7.91 |
| 2016 | 7.06 | 9.15 | 5.67 |
| 2015 | 14.89 | 26.46 | 5.53 |
| 2014 | 11.82 | 27.83 | 7.94 |
| 2013 | 13.34 | 17.7 | 10.13 |
| 2012 | 11.8 | 15.54 | 8.09 |
| 2011 | 12.51 | 17.69 | 7.26 |