| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 13.51 | 16.2 | 11.63 |
| 2024 | 10.24 | 22.4 | 5.97 |
| 2023 | 7.2 | 19.07 | 4.57 |
| 2022 | 4.39 | 7.1 | 2.89 |
| 2021 | 3.34 | 3.95 | 2.59 |
| 2020 | 3.79 | 4.78 | 2.82 |
| 2019 | 4.77 | 6.22 | 3.94 |
| 2018 | 6.27 | 9.52 | 4.54 |
| 2017 | 7.16 | 10.56 | 5.66 |
| 2016 | 7.4 | 10.35 | 5.21 |
| 2015 | 7.5 | 12.37 | 4.07 |
| 2014 | 6.22 | 10.29 | 3.39 |
| 2013 | 4.75 | 5.53 | 3.93 |
| 2012 | 5.61 | 7.73 | 3.95 |
| 2011 | 7.18 | 9.63 | 4.44 |
| 2010 | 7.54 | 9.15 | 5.49 |
| 2009 | 4.88 | 8.88 | 1.69 |
| 2008 | 2.58 | 4.53 | 1.32 |
| 2007 | 3.42 | 5.67 | 1.62 |
| 2006 | 1.79 | 2.47 | 1.49 |
| 2005 | 1.8 | 2.52 | 1.28 |
| 2004 | 3.2 | 4.95 | 2.28 |
| 2003 | 4.29 | 5.66 | 2.95 |