| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.89 | 5.34 | 4.04 |
| 2024 | 4.18 | 5.54 | 3.08 |
| 2023 | 6.89 | 10.02 | 4.63 |
| 2022 | 11.39 | 17.13 | 7.07 |
| 2021 | 14.63 | 21.32 | 9.08 |
| 2020 | 9.5 | 12.06 | 7.73 |
| 2019 | 6.8 | 8.95 | 5.1 |
| 2018 | 6.78 | 9.13 | 5.13 |
| 2017 | 9.47 | 12.11 | 7.09 |
| 2016 | 11.23 | 15.89 | 6.79 |
| 2015 | 6.15 | 12.66 | 3.48 |
| 2014 | 4.19 | 5.47 | 3.36 |
| 2013 | 2.72 | 4.9 | 1.72 |