| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.13 | 5.65 | 2.95 |
| 2024 | 2.86 | 7.55 | 1.51 |
| 2023 | 2.56 | 3.72 | 1.89 |
| 2022 | 2.9 | 5.02 | 1.74 |
| 2021 | 5.64 | 11.15 | 3.91 |
| 2020 | 5.57 | 8.59 | 3.4 |
| 2019 | 4.08 | 4.96 | 2.95 |
| 2018 | 5.83 | 7.81 | 2.98 |
| 2017 | 10.61 | 13.71 | 7.46 |
| 2016 | 20.33 | 38.47 | 12.26 |
| 2015 | 20.98 | 41.85 | 9.95 |
| 2014 | 6.13 | 9.95 | 4.39 |
| 2013 | 7.17 | 8.77 | 5.19 |
| 2012 | 6.27 | 8.64 | 4.67 |
| 2011 | 9.85 | 14.73 | 7.39 |