| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.61 | 11.93 | 9.33 |
| 2024 | 8.17 | 13.21 | 6.53 |
| 2023 | 10.5 | 14.1 | 8.47 |
| 2022 | 9.05 | 13.7 | 6.85 |
| 2021 | 7.94 | 11.94 | 5.24 |
| 2020 | 10.57 | 13.85 | 8.56 |
| 2019 | 8.05 | 10.25 | 4.97 |
| 2018 | 5.6 | 6.96 | 4.43 |
| 2017 | 7.68 | 10 | 6.16 |
| 2016 | 8.2 | 9.87 | 5.69 |
| 2015 | 8.18 | 15.73 | 5.32 |
| 2014 | 8.02 | 11.45 | 6.53 |
| 2013 | 7.53 | 12.81 | 4.1 |
| 2012 | 5.1 | 6.45 | 4.14 |
| 2011 | 7.64 | 11.09 | 5.45 |
| 2010 | 11.36 | 13.9 | 9.55 |
| 2009 | 8.62 | 11.82 | 5.86 |
| 2008 | 7.21 | 11.53 | 4.46 |
| 2007 | 8.05 | 10.87 | 5.06 |
| 2006 | 4.09 | 5.7 | 2.66 |
| 2005 | 4.27 | 5.57 | 3.02 |
| 2004 | 4.44 | 7.3 | 2.57 |