| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.49 | 9.73 | 2.55 |
| 2024 | 7.51 | 11.88 | 3.34 |
| 2023 | 4.66 | 12.27 | 1.23 |
| 2022 | 12.46 | 14.3 | 9.86 |
| 2021 | 14.07 | 16.18 | 11.98 |
| 2020 | 11.7 | 14.68 | 6.78 |
| 2019 | 14.53 | 16.82 | 12.61 |
| 2018 | 16.09 | 23.65 | 11.83 |
| 2017 | 26.6 | 31.33 | 22.87 |
| 2016 | 46.11 | 77.76 | 27.97 |
| 2015 | 173.4 | 524.49 | 43.03 |
| 2014 | 163.4 | 426.17 | 62.41 |
| 2013 | 537.84 | 2709.36 | 67.91 |
| 2012 | 709.88 | 1953.08 | 29.31 |
| 2011 | 17.81 | 37.4 | 10.12 |
| 2010 | 8.75 | 11.82 | 6.08 |
| 2009 | 6.95 | 11.91 | 4.07 |
| 2008 | 8.27 | 19.9 | 3.22 |
| 2007 | 18.57 | 58.13 | 0.87 |
| 2006 | 1.17 | 2.98 | 0.44 |
| 2005 | 0.41 | 1.8 | 0.06 |
| 2004 | 0.25 | 0.5 | 0.12 |