| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 8.55 | 13.55 | 6.24 |
| 2025 | 6.7 | 10.72 | 3.65 |
| 2024 | 3.13 | 6.13 | 1.94 |
| 2023 | 4.69 | 7 | 3.37 |
| 2022 | 6.26 | 7.99 | 3.81 |
| 2021 | 4.41 | 6.65 | 2.94 |
| 2020 | 3.21 | 6.82 | 1.6 |
| 2019 | 2.59 | 3.18 | 1.83 |
| 2018 | 1.83 | 2.54 | 1.31 |
| 2017 | 4.06 | 5.78 | 2.05 |
| 2016 | 7.56 | 10.91 | 5.47 |
| 2015 | 10.26 | 17.22 | 7.06 |
| 2014 | 13.91 | 21.68 | 8.4 |
| 2013 | 14.1 | 17.64 | 9.91 |
| 2012 | 14.52 | 18.85 | 9.29 |