| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.49 | 5.97 | 3.58 |
| 2024 | 3.09 | 4.74 | 2.22 |
| 2023 | 3.49 | 4.97 | 2.81 |
| 2022 | 3.08 | 4.98 | 2.39 |
| 2021 | 4.56 | 6.55 | 3.49 |
| 2020 | 8.49 | 11.2 | 6.08 |
| 2019 | 9.94 | 14.32 | 4.43 |
| 2018 | 6.41 | 10.56 | 3.82 |
| 2017 | 11.46 | 16.2 | 8.28 |
| 2016 | 21.42 | 35.42 | 15.75 |
| 2015 | 36.78 | 79.62 | 15.94 |
| 2014 | 12.53 | 23.85 | 6.33 |
| 2013 | 5.44 | 8.4 | 3.21 |
| 2012 | 3.28 | 3.99 | 2.75 |
| 2011 | 3.97 | 4.68 | 3.25 |
| 2010 | 4.26 | 5.44 | 2.9 |
| 2009 | 3.59 | 5.17 | 1.99 |
| 2008 | 3.2 | 5.75 | 1.44 |
| 2007 | 5.22 | 7.53 | 3.63 |
| 2006 | 3.26 | 5.11 | 1.54 |
| 2005 | 1.87 | 2.34 | 1.46 |
| 2004 | 2.71 | 4.4 | 1.9 |