| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.82 | 3.26 | 2.27 |
| 2024 | 2.04 | 4.06 | 1.42 |
| 2023 | 2.32 | 3.25 | 1.75 |
| 2022 | 1.74 | 2.31 | 1.13 |
| 2021 | 1.44 | 1.76 | 1.27 |
| 2020 | 1.81 | 2.56 | 1.34 |
| 2019 | 2.15 | 3.29 | 1.44 |
| 2018 | 2.15 | 3.19 | 1.4 |
| 2017 | 4.27 | 5.77 | 2.96 |
| 2016 | 8.11 | 10.08 | 5.56 |
| 2015 | 9.21 | 14.78 | 4.05 |
| 2014 | 6.22 | 10.67 | 4.15 |
| 2013 | 3.58 | 5.34 | 2.59 |
| 2012 | 3.19 | 3.81 | 2.53 |
| 2011 | 3.86 | 4.39 | 3.26 |