| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 5.39 | 5.95 | 4.65 |
| 2025 | 4.7 | 8.35 | 3.02 |
| 2024 | 3.39 | 5.68 | 2.11 |
| 2023 | 5.62 | 6.84 | 4.1 |
| 2022 | 5.96 | 8.79 | 3.79 |
| 2021 | 6.31 | 10.28 | 2.82 |
| 2020 | 4.89 | 8.52 | 2.65 |
| 2019 | 3.79 | 5.36 | 2.94 |
| 2018 | 3.9 | 4.97 | 2.79 |
| 2017 | 5 | 5.64 | 4.11 |
| 2016 | 4.43 | 5.3 | 3.76 |
| 2015 | 4.14 | 8.13 | 2.75 |
| 2014 | 3.32 | 4.42 | 2.56 |
| 2013 | 3.14 | 4.38 | 2.08 |
| 2012 | 3.36 | 3.95 | 2.46 |
| 2011 | 4.57 | 5.94 | 3.22 |