| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.71 | 4 | 3.27 |
| 2024 | 3.17 | 5.15 | 1.6 |
| 2023 | 3.05 | 4.61 | 2.23 |
| 2022 | 1.87 | 3.58 | 0.87 |
| 2021 | 1 | 1.67 | 0.49 |
| 2020 | 3.95 | 6.13 | 1.4 |
| 2019 | 2.68 | 3.57 | 1.83 |
| 2018 | 2.43 | 3.46 | 1.78 |
| 2017 | 2.47 | 2.94 | 2.17 |
| 2016 | 5.8 | 13.67 | 2.4 |
| 2015 | 8.36 | 19.37 | 1.82 |
| 2014 | 1.87 | 2.64 | 1.39 |
| 2013 | 2.84 | 4.87 | 2.04 |
| 2012 | 4.49 | 7.79 | 3.08 |
| 2011 | 0 | ||
| 2010 | 0 | ||
| 2009 | 0 | ||
| 2008 | 0 | ||
| 2007 | 3.09 | 4.17 | 2.42 |
| 2006 | 1.54 | 3.15 | 0.49 |
| 2005 | 0.42 | 0.67 | 0.23 |
| 2004 | 0.78 | 1.44 | 0.42 |