| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 34.14 | 53.19 | 21.19 |
| 2024 | 25.58 | 46.64 | 19.44 |
| 2023 | 20.07 | 29.78 | 9.24 |
| 2022 | 7.87 | 12.75 | 5.47 |
| 2021 | 4.4 | 6.17 | 3.29 |
| 2020 | 4.76 | 6.46 | 3.79 |
| 2019 | 4.98 | 5.7 | 4.48 |
| 2018 | 7.53 | 9.24 | 5.7 |
| 2017 | 5.45 | 7.19 | 4.8 |
| 2016 | 4.73 | 5.82 | 2.73 |
| 2015 | 4.78 | 8.8 | 2.34 |
| 2014 | 2.67 | 5.92 | 1.61 |
| 2013 | 4.09 | 5.52 | 3.23 |
| 2012 | 3.7 | 4.48 | 2.83 |
| 2011 | 4.46 | 5.56 | 2.91 |
| 2010 | 7.35 | 11.01 | 4.67 |
| 2009 | 7.46 | 12.62 | 3.37 |
| 2008 | 5.4 | 9.8 | 2.6 |
| 2007 | 8.32 | 13.72 | 4.32 |
| 2006 | 7.54 | 16.82 | 3.84 |
| 2005 | 7.84 | 16.82 | 2.1 |
| 2004 | 4.61 | 6.38 | 3.33 |