| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.48 | 8.88 | 4.09 |
| 2024 | 4.24 | 5.69 | 2.98 |
| 2023 | 4.97 | 6.01 | 3.58 |
| 2022 | 5.72 | 7.87 | 4.12 |
| 2021 | 12.37 | 19.21 | 6.84 |
| 2020 | 12.79 | 18.8 | 5.71 |
| 2019 | 5.11 | 6.39 | 3.74 |
| 2018 | 2.97 | 3.97 | 2.22 |
| 2017 | 3.81 | 4.84 | 3.11 |
| 2016 | 5.43 | 7.18 | 4.03 |
| 2015 | 7.76 | 9.74 | 5.08 |
| 2014 | 5.09 | 6.47 | 3.63 |
| 2013 | 3.06 | 6.09 | 1.9 |
| 2012 | 2.26 | 2.76 | 1.65 |
| 2011 | 2.66 | 3.35 | 2.04 |