| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.16 | 7.11 | 2.29 |
| 2024 | 1.86 | 3.22 | 1.3 |
| 2023 | 4.01 | 6.82 | 2.21 |
| 2022 | 5.79 | 7.7 | 4.55 |
| 2021 | 4.93 | 5.81 | 4.21 |
| 2020 | 6.03 | 7.63 | 4.64 |
| 2019 | 6.75 | 9.12 | 5.03 |
| 2018 | 6.22 | 8.33 | 4.85 |
| 2017 | 8.97 | 10.54 | 7.49 |
| 2016 | 11.53 | 15.9 | 8.5 |
| 2015 | 8.18 | 15.06 | 5.07 |
| 2014 | 4.84 | 6.56 | 3.79 |
| 2013 | 2.88 | 4.47 | 2.27 |
| 2012 | 2.78 | 3.68 | 2.03 |
| 2011 | 4.6 | 6.79 | 2.92 |