| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 4.5 | 6.41 | 3.79 |
| 2023 | 4.25 | 4.77 | 3.76 |
| 2022 | 4.06 | 5.36 | 3.29 |
| 2021 | 4.28 | 5.78 | 2.9 |
| 2020 | 5.13 | 7.13 | 4.38 |
| 2019 | 8.25 | 13.74 | 4.4 |
| 2018 | 9.94 | 12.37 | 7.77 |
| 2017 | 9.9 | 11.5 | 8.76 |
| 2016 | 6.62 | 10.25 | 4.53 |
| 2015 | 13.17 | 24.55 | 4.77 |
| 2014 | 12.49 | 24.52 | 9.75 |
| 2013 | 15.9 | 19.75 | 13.35 |
| 2012 | 14.52 | 18.44 | 8.91 |
| 2011 | 14.71 | 27.11 | 9.07 |
| 2010 | 560.12 | 2940.12 | 22.25 |
| 2009 | 34.2 | 37.92 | 28.51 |
| 2008 | 27.05 | 28.51 | 25.34 |
| 2007 | 25.74 | 32.96 | 22.67 |
| 2006 | 55.82 | 98.06 | 32.96 |