| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.31 | 4.47 | 2.6 |
| 2024 | 4.26 | 5.79 | 2.9 |
| 2023 | 4.53 | 8.43 | 2.82 |
| 2022 | 3 | 4.66 | 1.44 |
| 2021 | 2.65 | 3.75 | 1.68 |
| 2020 | 7.36 | 14.05 | 3.61 |
| 2019 | 4.23 | 7.21 | 2.93 |
| 2018 | 5.06 | 8.48 | 2.78 |
| 2017 | 12.44 | 17.28 | 8.19 |
| 2016 | 17.1 | 23.5 | 12.6 |
| 2015 | 17.31 | 26.61 | 9.61 |
| 2014 | 10.92 | 16.36 | 8.36 |
| 2013 | 6.87 | 10.36 | 3.97 |
| 2012 | 6.41 | 9.11 | 4.53 |
| 2011 | 7.35 | 9.31 | 5.39 |