| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 5.7 | 12.57 | 3.05 |
| 2023 | 4.44 | 11.05 | 1.7 |
| 2022 | 1.89 | 2.39 | 1.57 |
| 2021 | 3.29 | 5.03 | 1.94 |
| 2020 | 3.3 | 5.4 | 2.2 |
| 2019 | 2.25 | 4.01 | 0.91 |
| 2018 | 1.73 | 2.8 | 0.97 |
| 2017 | 3.81 | 6.33 | 2.67 |
| 2016 | 2.97 | 6.39 | 1.34 |
| 2015 | 1.96 | 3.01 | 1.2 |
| 2014 | 2.73 | 3.89 | 1.78 |
| 2013 | 7.38 | 9.3 | 3.61 |
| 2012 | 7.37 | 10.29 | 3.37 |
| 2011 | 5.36 | 9.38 | 3.56 |
| 2010 | 42.66 | 299.12 | 5.98 |
| 2009 | 14.93 | 24.18 | 5.54 |
| 2008 | 5.03 | 5.54 | 4.48 |
| 2007 | 5.07 | 5.99 | 4.48 |
| 2006 | 4.27 | 5.99 | 2.98 |
| 2005 | 2.57 | 3.55 | 1.8 |
| 2004 | 3.83 | 6.98 | 2.21 |