| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.64 | 13.09 | 6.64 |
| 2024 | 7.09 | 10.15 | 3.63 |
| 2023 | 2.55 | 4.2 | 0.81 |
| 2022 | 9.17 | 36.41 | 0.85 |
| 2021 | 3.1 | 22.12 | 1.67 |
| 2020 | 4.75 | 7.81 | 2.21 |
| 2019 | 4.2 | 6.38 | 3.07 |
| 2018 | 5.79 | 8.1 | 3.68 |
| 2017 | 11.32 | 16.38 | 7.04 |
| 2016 | 18.33 | 22.68 | 13.94 |
| 2015 | 24.54 | 35.59 | 10.76 |
| 2014 | 18.54 | 26.24 | 9.06 |
| 2013 | 8.43 | 12.17 | 5.23 |
| 2012 | 5.85 | 7.83 | 4.59 |
| 2011 | 9.73 | 13.1 | 6.2 |