| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 6.32 | 9.03 | 5.25 |
| 2025 | 6.19 | 7.32 | 5.03 |
| 2024 | 6.05 | 8.28 | 4.71 |
| 2023 | 9.43 | 13.66 | 6.89 |
| 2022 | 12.25 | 18.73 | 9.54 |
| 2021 | 13.41 | 18.79 | 9.57 |
| 2020 | 5.1 | 11.9 | 2.83 |
| 2019 | 2.52 | 3.86 | 1.57 |
| 2018 | 4.92 | 7.65 | 2 |
| 2017 | 8.14 | 10.32 | 6.56 |
| 2016 | 14.84 | 22.67 | 9.31 |
| 2015 | 21.44 | 28.37 | 6.41 |
| 2014 | 3.98 | 8.14 | 2 |
| 2013 | 2.48 | 3.24 | 1.56 |
| 2012 | 4.37 | 6.28 | 2.59 |
| 2011 | 6.21 | 8.99 | 4.26 |