| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 10.15 | 14.69 | 8.12 |
| 2022 | 23.35 | 47.84 | 7.34 |
| 2021 | 11.99 | 16.64 | 8.29 |
| 2020 | 17.55 | 30.27 | 11.78 |
| 2019 | 15.37 | 34.12 | 6.47 |
| 2018 | 9.93 | 14.3 | 5.68 |
| 2017 | 9.7 | 14.85 | 5.3 |
| 2016 | 6.06 | 9.81 | 4.59 |
| 2015 | 18.77 | 28.66 | 8.87 |
| 2014 | 20.83 | 35.03 | 10.41 |
| 2013 | 9.63 | 11.57 | 6.6 |
| 2012 | 17.93 | 31.34 | 8.97 |
| 2011 | 35.8 | 58.79 | 19.09 |
| 2010 | 37.51 | 55.5 | 23.98 |
| 2009 | 20.22 | 32.33 | 10.08 |
| 2008 | 12.55 | 21.64 | 4.74 |
| 2007 | 20.21 | 43.37 | 12.41 |
| 2006 | 11.53 | 28.51 | 2.07 |
| 2005 | 2.33 | 2.93 | 1.66 |
| 2004 | 2.99 | 5.59 | 1.62 |