| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.5 | 3.98 | 3.18 |
| 2024 | 2.8 | 4.14 | 1.82 |
| 2023 | 2.71 | 3.53 | 2.34 |
| 2022 | 2.6 | 3.11 | 1.99 |
| 2021 | 2.49 | 3.32 | 1.81 |
| 2020 | 2.43 | 4 | 1.8 |
| 2019 | 2.4 | 3.76 | 1.93 |
| 2018 | 3.26 | 10.56 | 1.8 |
| 2017 | 10.43 | 11.7 | 9.41 |
| 2016 | 8.41 | 12.68 | 5.11 |
| 2015 | 4.16 | 7.23 | 2.25 |
| 2014 | 2.17 | 3.11 | 1.73 |
| 2013 | 1.66 | 2 | 1.41 |