| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 15.95 | 19.49 | 14.09 |
| 2024 | 11.83 | 19.64 | 7.68 |
| 2023 | 8.74 | 13.57 | 5.8 |
| 2022 | 8.75 | 14.21 | 5.61 |
| 2021 | 3.05 | 7.57 | 1.75 |
| 2020 | 2.6 | 3.88 | 1.61 |
| 2019 | 2.27 | 3.47 | 1.62 |
| 2018 | 3.26 | 4.39 | 2.16 |
| 2017 | 4.09 | 4.75 | 3.62 |
| 2016 | 6.19 | 7.89 | 4.58 |
| 2015 | 11 | 20.67 | 5.69 |
| 2014 | 9.7 | 11.65 | 8.22 |
| 2013 | 5.31 | 7.96 | 2.69 |
| 2012 | 3.19 | 3.94 | 2.38 |