| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 29.75 | 40.95 | 12.15 |
| 2024 | 31.5 | 46.2 | 21.62 |
| 2023 | 37.95 | 46.81 | 24.86 |
| 2022 | 25.18 | 35.17 | 18.53 |
| 2021 | 17.24 | 26.17 | 8.96 |
| 2020 | 8.13 | 13.17 | 2.72 |
| 2019 | 5.06 | 6.47 | 3.63 |
| 2018 | 6.32 | 7.02 | 5.82 |
| 2017 | 7.27 | 9.45 | 6.15 |
| 2016 | 6.81 | 10.47 | 4.72 |
| 2015 | 5.41 | 12.88 | 3.48 |
| 2014 | 3.2 | 4.36 | 2.47 |
| 2013 | 3.25 | 4.61 | 2.47 |
| 2012 | 1.98 | 2.4 | 1.52 |
| 2011 | 3.16 | 4.42 | 1.85 |
| 2010 | 4.8 | 6.02 | 4.02 |