| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.33 | 3.75 | 2.8 |
| 2024 | 3.58 | 4.55 | 2.82 |
| 2023 | 4.2 | 4.71 | 3.72 |
| 2022 | 4.61 | 8.64 | 3.15 |
| 2021 | 11.5 | 16.96 | 7.89 |
| 2020 | 9.52 | 17.13 | 5.25 |
| 2019 | 4.4 | 6.42 | 3.5 |
| 2018 | 4.46 | 5.52 | 3.64 |
| 2017 | 5.54 | 7.42 | 4.06 |
| 2016 | 8.88 | 12.28 | 6.42 |
| 2015 | 8.61 | 12.72 | 5.01 |
| 2014 | 8.46 | 10.54 | 4.56 |
| 2013 | 5.36 | 7.63 | 4.03 |
| 2012 | 4.64 | 5.86 | 3.46 |
| 2011 | 7.73 | 9.38 | 5.58 |