| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.99 | 4.3 | 3.59 |
| 2024 | 3.63 | 4.64 | 2.64 |
| 2023 | 3.95 | 4.83 | 3.17 |
| 2022 | 4.52 | 7.52 | 3.1 |
| 2021 | 8.27 | 12.64 | 4.44 |
| 2020 | 6.04 | 7.66 | 4.28 |
| 2019 | 7.53 | 14.97 | 4.3 |
| 2018 | 6.34 | 9.52 | 4.84 |
| 2017 | 12.12 | 27.82 | 7.03 |
| 2016 | 15.55 | 28.45 | 7.48 |
| 2015 | 10.16 | 16.06 | 5.81 |
| 2014 | 10.53 | 16.8 | 7.32 |
| 2013 | 13.36 | 19.7 | 9.12 |
| 2012 | 7.66 | 10.35 | 5.3 |