| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.13 | 6.69 | 5.06 |
| 2024 | 5.26 | 6.94 | 3.81 |
| 2023 | 7.2 | 9.01 | 5.82 |
| 2022 | 10.01 | 15.13 | 6.35 |
| 2021 | 14.35 | 21.58 | 9.24 |
| 2020 | 10.51 | 13.58 | 8.71 |
| 2019 | 7.76 | 10.58 | 5.46 |
| 2018 | 7.52 | 10.47 | 5.46 |
| 2017 | 12.05 | 16.75 | 9.08 |
| 2016 | 16.26 | 23.04 | 9.98 |
| 2015 | 9.38 | 18.6 | 5.56 |
| 2014 | 7 | 9.87 | 5.48 |
| 2013 | 5.48 | 8.83 | 3.7 |