| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 2.22 | 4.37 | 0.39 |
| 2021 | 4.03 | 6.91 | 2.93 |
| 2020 | 3.49 | 7 | 1.1 |
| 2019 | 2.69 | 7.17 | 0.77 |
| 2018 | 1.76 | 3.09 | 0.88 |
| 2017 | 3.2 | 5.57 | 2.27 |
| 2016 | 6.22 | 10.1 | 4.73 |
| 2015 | 17.69 | 42.81 | 6 |
| 2014 | 5.51 | 8.06 | 3.75 |
| 2013 | 3.1 | 4.09 | 2.46 |
| 2012 | 2.66 | 3.36 | 2.22 |
| 2011 | 4.19 | 5.32 | 2.52 |
| 2010 | 5.33 | 6.89 | 4.1 |
| 2009 | 4.54 | 6.31 | 2.34 |
| 2008 | 5.77 | 12.84 | 1.69 |
| 2007 | 5.62 | 9.45 | 3.18 |
| 2006 | 3.04 | 4.22 | 1.92 |
| 2005 | 1.79 | 2.32 | 1.02 |
| 2004 | 1.84 | 2.88 | 1.27 |