| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.59 | 1.87 | 1.29 |
| 2024 | 1.32 | 1.66 | 1.12 |
| 2023 | 1.64 | 2.11 | 1.33 |
| 2022 | 1.53 | 1.68 | 1.29 |
| 2021 | 2.44 | 4.02 | 1.29 |
| 2020 | 4.01 | 5.29 | 2.99 |
| 2019 | 4.19 | 5.93 | 3.32 |
| 2018 | 4.42 | 5.19 | 3.39 |
| 2017 | 7.01 | 8.44 | 5.19 |
| 2016 | 9.8 | 16.11 | 8.31 |
| 2015 | 19.9 | 34.77 | 12.37 |
| 2014 | 16.52 | 22.4 | 12.53 |
| 2013 | 13.94 | 21.06 | 9.31 |
| 2012 | 8.69 | 15.3 | 6.31 |
| 2011 | 0 | ||
| 2010 | 0 | ||
| 2009 | 0 | ||
| 2008 | 0 | ||
| 2007 | 0 | ||
| 2006 | 0.49 | 0.61 | 0.33 |
| 2005 | 0.53 | 0.8 | 0.39 |
| 2004 | 1.33 | 2.6 | 0.43 |