| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.61 | 16.32 | 7.82 |
| 2024 | 8.76 | 13.74 | 6.08 |
| 2023 | 13.56 | 18.09 | 8.99 |
| 2022 | 7.57 | 15.2 | 5.25 |
| 2021 | 7.39 | 10.27 | 4.41 |
| 2020 | 10.86 | 16.07 | 6.21 |
| 2019 | 7.78 | 13.9 | 4.37 |
| 2018 | 6.5 | 10.79 | 4.25 |
| 2017 | 11.4 | 18.3 | 6.88 |
| 2016 | 14.99 | 20.21 | 10.46 |
| 2015 | 11.72 | 20.82 | 6.36 |
| 2014 | 5.79 | 7.54 | 3.53 |
| 2013 | 3.44 | 5.43 | 2.1 |
| 2012 | 2.84 | 3.93 | 1.94 |
| 2011 | 4.04 | 4.9 | 2.84 |
| 2010 | 4.54 | 5.47 | 3.28 |
| 2009 | 4.53 | 5.35 | 3.7 |