| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.57 | 6.36 | 5.21 |
| 2024 | 7.47 | 9.61 | 5.33 |
| 2023 | 7.57 | 9.61 | 5.99 |
| 2022 | 7.77 | 12.22 | 5.68 |
| 2021 | 21.04 | 36.38 | 11.67 |
| 2020 | 17.1 | 24.67 | 9.64 |
| 2019 | 9.63 | 11.85 | 8.21 |
| 2018 | 10.62 | 13.72 | 6.75 |
| 2017 | 14.93 | 16.63 | 12.22 |
| 2016 | 15 | 18.46 | 10.48 |
| 2015 | 11.4 | 15.22 | 9.09 |
| 2014 | 11.37 | 16.05 | 7.85 |
| 2013 | 9.48 | 13.09 | 7.34 |
| 2012 | 0 | ||
| 2011 | 0 | ||
| 2010 | 0 | ||
| 2009 | 0 | ||
| 2008 | 0 | ||
| 2007 | 1.09 | 1.7 | 0.66 |
| 2006 | 0.76 | 1.17 | 0.57 |
| 2005 | 1 | 1.45 | 0.53 |
| 2004 | 1.18 | 2.5 | 0.73 |