| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.18 | 6.05 | 4.5 |
| 2024 | 9.85 | 14.24 | 5.08 |
| 2023 | 12.4 | 19.36 | 6.47 |
| 2022 | 6.48 | 8.63 | 4.75 |
| 2021 | 12.52 | 23.09 | 5.71 |
| 2020 | 11.76 | 22.93 | 5.65 |
| 2019 | 7.29 | 11.61 | 2.98 |
| 2018 | 3.42 | 4.87 | 2.06 |
| 2017 | 6.36 | 7.97 | 4.08 |
| 2016 | 8.55 | 11.62 | 7.19 |
| 2015 | 23.77 | 50.46 | 9.42 |
| 2014 | 19.94 | 32.69 | 12.22 |
| 2013 | 13.9 | 19.85 | 10.68 |