| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 5.09 | 5.09 | 5.09 |
| 2021 | 3.2 | 5.79 | 1.9 |
| 2020 | 1.27 | 2.01 | 0.93 |
| 2019 | 1.56 | 1.97 | 1.26 |
| 2018 | 1.53 | 1.89 | 1.14 |
| 2017 | 2.25 | 3.34 | 1.68 |
| 2016 | 2.71 | 3.77 | 2.03 |
| 2015 | 2.72 | 4.51 | 1.89 |
| 2014 | 1.6 | 2.21 | 1.27 |
| 2013 | 2.03 | 2.77 | 1.48 |
| 2012 | 2.96 | 3.71 | 2.21 |
| 2011 | 4.22 | 5.14 | 2.74 |
| 2010 | 4.5 | 5.87 | 3.01 |
| 2009 | 4.3 | 5.97 | 2 |
| 2008 | 6.58 | 19.07 | 1.65 |
| 2007 | 14.33 | 29.83 | 5.46 |
| 2006 | 1.58 | 5.65 | 0.58 |
| 2005 | 0.63 | 0.8 | 0.53 |
| 2004 | 1.13 | 2.27 | 0.62 |