| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.57 | 4.59 | 3.05 |
| 2024 | 3.58 | 4.38 | 2.74 |
| 2023 | 5.06 | 7.55 | 3.19 |
| 2022 | 2.69 | 3.51 | 2.04 |
| 2021 | 3.16 | 4.4 | 2.56 |
| 2020 | 4.23 | 5.69 | 3.1 |
| 2019 | 3.82 | 4.53 | 3.19 |
| 2018 | 3.92 | 5.1 | 3.14 |
| 2017 | 5.71 | 7.39 | 4.48 |
| 2016 | 7.04 | 12.12 | 5.87 |
| 2015 | 9.41 | 16.57 | 5.72 |
| 2014 | 6.33 | 11.26 | 3.95 |
| 2013 | 4.14 | 5.01 | 3.29 |
| 2012 | 3.29 | 4.79 | 2.49 |
| 2011 | 3.73 | 5.14 | 2.56 |