| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 17.1 | 18.51 | 14.53 |
| 2024 | 8.43 | 19.14 | 4.26 |
| 2023 | 3.51 | 8.64 | 1.65 |
| 2022 | 2.1 | 2.87 | 1.74 |
| 2021 | 2.49 | 3.11 | 2.07 |
| 2020 | 2.82 | 3.71 | 2.34 |
| 2019 | 3.16 | 5.02 | 2.23 |
| 2018 | 3.66 | 5.44 | 2.25 |
| 2017 | 6.75 | 9.09 | 4.84 |
| 2016 | 7.58 | 8.51 | 6.75 |
| 2015 | 11.38 | 19.68 | 6.35 |
| 2014 | 7.09 | 9.6 | 5.64 |
| 2013 | 6.47 | 8.47 | 4.66 |
| 2012 | 4.86 | 5.94 | 3.92 |