| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.07 | 7.49 | 6.21 |
| 2024 | 4.73 | 8.53 | 2.58 |
| 2023 | 4.33 | 5.47 | 3.68 |
| 2022 | 4.44 | 5.19 | 3.43 |
| 2021 | 5.87 | 8 | 5.05 |
| 2020 | 6.78 | 12.67 | 4.12 |
| 2019 | 3.93 | 4.9 | 3.42 |
| 2018 | 5.79 | 9.35 | 3.39 |
| 2017 | 8.96 | 11.24 | 7.44 |
| 2016 | 11.36 | 15.19 | 8.92 |
| 2015 | 13.52 | 18.89 | 8.29 |
| 2014 | 9.62 | 13.46 | 7.25 |
| 2013 | 10.39 | 13.24 | 7.81 |
| 2012 | 6.99 | 9.93 | 4.93 |
| 2011 | 11.59 | 15.03 | 7.81 |
| 2010 | 13.65 | 16.84 | 10.68 |
| 2009 | 10.06 | 13.59 | 7.75 |
| 2008 | 10.48 | 17.51 | 4.59 |