| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.01 | 11.23 | 7.13 |
| 2024 | 7.04 | 11.88 | 5 |
| 2023 | 10.26 | 15.45 | 7.63 |
| 2022 | 14.56 | 20.66 | 10.09 |
| 2021 | 10.66 | 18.33 | 6.05 |
| 2020 | 7.75 | 14.31 | 5.56 |
| 2019 | 5.86 | 7.79 | 4.84 |
| 2018 | 7.81 | 10.76 | 5.29 |
| 2017 | 15.85 | 23.47 | 9.65 |
| 2016 | 19.56 | 23.71 | 14.73 |
| 2015 | 21.91 | 37.82 | 11.56 |
| 2014 | 12.2 | 14.55 | 9.76 |
| 2013 | 12.06 | 14.99 | 9.26 |
| 2012 | 13.69 | 17.38 | 10.63 |