| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.12 | 5.89 | 4.22 |
| 2024 | 4.93 | 6.66 | 3.3 |
| 2023 | 7.84 | 10.6 | 5.81 |
| 2022 | 8.96 | 10.97 | 7.47 |
| 2021 | 13.29 | 18.55 | 10.17 |
| 2020 | 9.84 | 15.16 | 5.95 |
| 2019 | 6.87 | 8.58 | 5.95 |
| 2018 | 9.65 | 13.71 | 5.95 |
| 2017 | 10.71 | 12.35 | 9.22 |
| 2016 | 10.49 | 13.57 | 9.3 |
| 2015 | 15.13 | 25.38 | 10.86 |
| 2014 | 12.92 | 20.44 | 9.15 |
| 2013 | 11.41 | 16.53 | 8.16 |
| 2012 | 8.67 | 12.36 | 6.49 |
| 2011 | 17.27 | 22.87 | 11.66 |