| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.88 | 14.28 | 8.89 |
| 2024 | 9.5 | 12.03 | 6.62 |
| 2023 | 8.93 | 12.04 | 7.11 |
| 2022 | 7.24 | 10.02 | 4.91 |
| 2021 | 6.83 | 8.96 | 5.27 |
| 2020 | 6.46 | 8.51 | 4.48 |
| 2019 | 4.78 | 6.47 | 3.25 |
| 2018 | 6.26 | 7.79 | 4.45 |
| 2017 | 9.77 | 13.37 | 6.76 |
| 2016 | 14.55 | 18.66 | 12.54 |
| 2015 | 22.17 | 34.02 | 16.32 |
| 2014 | 20.74 | 25.39 | 16.65 |
| 2013 | 23.76 | 31.52 | 17.36 |