| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.45 | 8.71 | 4.78 |
| 2024 | 2.37 | 7.26 | 1.18 |
| 2023 | 7.13 | 18.61 | 1.63 |
| 2022 | 6.42 | 16.54 | 4.7 |
| 2021 | 3.47 | 12.42 | 2.55 |
| 2020 | 3.82 | 4.54 | 3.14 |
| 2019 | 4.34 | 6.96 | 2.8 |
| 2018 | 4.32 | 6.95 | 3.13 |
| 2017 | 10.86 | 19.45 | 5.13 |
| 2016 | 9.79 | 18 | 5.57 |
| 2015 | 8.85 | 17.9 | 6.42 |
| 2014 | 6.78 | 9.85 | 4.57 |
| 2013 | 5.02 | 5.82 | 4.3 |
| 2012 | 4.84 | 6.25 | 3.55 |
| 2011 | 6.09 | 8.36 | 3.74 |
| 2010 | 6.46 | 8.69 | 4.08 |
| 2009 | 6.03 | 8.5 | 4.33 |