| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.29 | 6.91 | 3.43 |
| 2024 | 3.81 | 4.24 | 3.28 |
| 2023 | 4.28 | 4.91 | 3.77 |
| 2022 | 4.75 | 6.03 | 3.98 |
| 2021 | 5.94 | 6.88 | 5.27 |
| 2020 | 8.42 | 10.79 | 6.69 |
| 2019 | 7.78 | 9.43 | 5.04 |
| 2018 | 7.53 | 10.03 | 5.38 |
| 2017 | 8.04 | 11.39 | 5.1 |
| 2016 | 8 | 16.03 | 3.82 |
| 2015 | 6.66 | 7.68 | 4.27 |
| 2014 | 4.09 | 4.9 | 3.43 |
| 2013 | 4.6 | 5.36 | 3.94 |
| 2012 | 4.94 | 6.39 | 3.87 |
| 2011 | 7.37 | 10.08 | 4.46 |
| 2010 | 7.77 | 10.36 | 5.64 |
| 2009 | 8.71 | 10.73 | 5.48 |
| 2008 | 13.57 | 31.33 | 3.9 |
| 2007 | 17.75 | 26.39 | 10.12 |
| 2006 | 7.49 | 10.87 | 1.6 |
| 2005 | 2.57 | 5.58 | 1.46 |
| 2004 | 6.65 | 11.69 | 4.91 |