| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.58 | 7.78 | 5.13 |
| 2024 | 3.29 | 8.35 | 2.28 |
| 2023 | 4.35 | 6.45 | 3.43 |
| 2022 | 5.09 | 7.51 | 3.59 |
| 2021 | 8.27 | 11.06 | 5.54 |
| 2020 | 11.61 | 16.33 | 8.29 |
| 2019 | 6.97 | 9.49 | 4.79 |
| 2018 | 8.08 | 11.75 | 5.33 |
| 2017 | 9.09 | 12.99 | 5.45 |
| 2016 | 18.92 | 32.12 | 12.46 |
| 2015 | 38.86 | 115.92 | 19.09 |
| 2014 | 14.85 | 34.9 | 8.51 |
| 2013 | 10.21 | 14.96 | 7.07 |