| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.26 | 10.73 | 7.87 |
| 2024 | 6.79 | 12.47 | 3.29 |
| 2023 | 3.51 | 4.5 | 3.11 |
| 2022 | 3.45 | 4.17 | 2.98 |
| 2021 | 2.97 | 4.22 | 2.42 |
| 2020 | 2.86 | 3.44 | 2.33 |
| 2019 | 3.01 | 3.8 | 2.5 |
| 2018 | 3.33 | 4.75 | 2.31 |
| 2017 | 5.7 | 6.52 | 4.34 |
| 2016 | 6.06 | 7.06 | 4.51 |
| 2015 | 7.59 | 11.78 | 4.37 |
| 2014 | 4.81 | 7.44 | 3.61 |
| 2013 | 3.58 | 4.46 | 2.85 |
| 2012 | 4.06 | 4.95 | 3.06 |
| 2011 | 6.23 | 8.93 | 3.91 |
| 2010 | 5.68 | 9.29 | 3.72 |
| 2009 | 4.79 | 6.42 | 2.85 |
| 2008 | 5.56 | 11.71 | 2.35 |
| 2007 | 9.1 | 14.73 | 4.27 |
| 2006 | 4.66 | 6.52 | 3.79 |
| 2005 | 3.99 | 5.28 | 2.99 |
| 2004 | 4.59 | 7.87 | 3.56 |