| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.33 | 3.78 | 3.01 |
| 2024 | 3.25 | 4 | 2.52 |
| 2023 | 4.83 | 8.29 | 3.4 |
| 2022 | 7.04 | 10.87 | 5.4 |
| 2021 | 11.62 | 14.64 | 8.41 |
| 2020 | 15.02 | 20.7 | 10.89 |
| 2019 | 8.7 | 11.65 | 5.63 |
| 2018 | 11.28 | 19.68 | 7.87 |
| 2017 | 9.93 | 12.32 | 8.18 |
| 2016 | 9.7 | 17.25 | 7.88 |
| 2015 | 14.96 | 22.86 | 8.15 |
| 2014 | 7.82 | 10.2 | 6.04 |
| 2013 | 7.36 | 10.49 | 5.82 |
| 2012 | 7.84 | 9.72 | 5.88 |
| 2011 | 9.63 | 13.9 | 6.8 |
| 2010 | 16.31 | 21.8 | 13.24 |