| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 14.4 | 15.7 | 12.14 |
| 2024 | 6.83 | 16.57 | 4.08 |
| 2023 | 7.53 | 9.53 | 5.68 |
| 2022 | 5.15 | 6.54 | 2.7 |
| 2021 | 3.32 | 4.8 | 1.96 |
| 2020 | 3.08 | 4.72 | 1.7 |
| 2019 | 2.97 | 4.13 | 2.5 |
| 2018 | 3.6 | 4.51 | 3.02 |
| 2017 | 3.81 | 4.62 | 3.21 |
| 2016 | 11.7 | 17.76 | 4.37 |
| 2015 | 12.79 | 25.69 | 5.99 |
| 2014 | 7.06 | 9.22 | 5.65 |
| 2013 | 5.63 | 7.64 | 2.52 |