| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 12.3 | 15.91 | 10.33 |
| 2025 | 8.95 | 12.09 | 6.99 |
| 2024 | 8.34 | 12.82 | 5.66 |
| 2023 | 9.41 | 14.31 | 3.26 |
| 2022 | 3.15 | 4.3 | 2.28 |
| 2021 | 2.5 | 3.6 | 1.87 |
| 2020 | 2.77 | 4.77 | 1.75 |
| 2019 | 3.6 | 4.94 | 2.3 |
| 2018 | 3.9 | 6.27 | 2.63 |
| 2017 | 12.72 | 18.02 | 4.95 |
| 2016 | 10.33 | 18.86 | 6.92 |
| 2015 | 6.9 | 12.22 | 3.68 |
| 2014 | 4.81 | 5.99 | 3.68 |
| 2013 | 5.03 | 6.79 | 3.49 |
| 2012 | 5.99 | 8.01 | 3.64 |