| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 5.74 | 7.02 | 4.9 |
| 2025 | 5.93 | 7.39 | 4.75 |
| 2024 | 4.28 | 8.27 | 2.37 |
| 2023 | 2.98 | 4.54 | 2.04 |
| 2022 | 2.55 | 3.97 | 1.89 |
| 2021 | 3.46 | 5 | 2.57 |
| 2020 | 4.37 | 6.77 | 2.46 |
| 2019 | 3.75 | 5.6 | 2.72 |
| 2018 | 5.8 | 10.05 | 3.05 |
| 2017 | 9.89 | 12.2 | 7.83 |
| 2016 | 14.02 | 23.23 | 10.84 |
| 2015 | 10.31 | 27.08 | 6.09 |
| 2014 | 6.52 | 8.83 | 4.92 |
| 2013 | 6.87 | 10.24 | 5.04 |
| 2012 | 7.22 | 10.41 | 4.22 |
| 2011 | 11.87 | 12.68 | 9.27 |