| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.48 | 4.14 | 2.88 |
| 2024 | 2.38 | 3.31 | 1.78 |
| 2023 | 5.59 | 12.52 | 2.42 |
| 2022 | 6.79 | 11.69 | 2.77 |
| 2021 | 4.4 | 9.08 | 2.62 |
| 2020 | 3.15 | 3.95 | 2.47 |
| 2019 | 2.07 | 3.01 | 1.47 |
| 2018 | 2.53 | 4.52 | 1.22 |
| 2017 | 4.82 | 5.68 | 4.18 |
| 2016 | 6.1 | 7.78 | 4.69 |
| 2015 | 5.6 | 10.87 | 3.39 |
| 2014 | 4.47 | 7.92 | 3.23 |
| 2013 | 2.78 | 4.09 | 2.04 |
| 2012 | 2.41 | 3.11 | 1.86 |
| 2011 | 4.01 | 6.13 | 2.54 |