| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 13.9 | 16.39 | 10.48 |
| 2024 | 10.97 | 20.96 | 8.26 |
| 2023 | 9.19 | 12.41 | 6.22 |
| 2022 | 7.27 | 9.3 | 6.08 |
| 2021 | 8.84 | 11.81 | 7.74 |
| 2020 | 11.61 | 16.49 | 8.77 |
| 2019 | 17.48 | 24.98 | 13.93 |
| 2018 | 13.7 | 19.93 | 9.99 |
| 2017 | 14.64 | 23.87 | 9.87 |
| 2016 | 18.23 | 31.86 | 3.89 |
| 2015 | 2.99 | 7.18 | 1.72 |
| 2014 | 1.57 | 2.15 | 1.18 |
| 2013 | 1.26 | 1.91 | 0.98 |