| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 6.17 | 6.94 | 5.3 |
| 2025 | 4.53 | 7.23 | 2.91 |
| 2024 | 2.87 | 4.72 | 1.51 |
| 2023 | 3.06 | 4.08 | 2.31 |
| 2022 | 2.39 | 2.9 | 1.74 |
| 2021 | 2.19 | 2.94 | 1.53 |
| 2020 | 2.46 | 3.2 | 1.79 |
| 2019 | 2.37 | 3.54 | 1.74 |
| 2018 | 4.03 | 6 | 1.6 |
| 2017 | 5.28 | 6.86 | 4.29 |
| 2016 | 7.28 | 10.51 | 5.85 |
| 2015 | 8.53 | 16.76 | 4.07 |
| 2014 | 4.4 | 5.65 | 3.33 |
| 2013 | 4.74 | 6.14 | 3.34 |
| 2012 | 3.63 | 4.51 | 2.68 |