| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2018 | 6.49 | 10.28 | 4.32 |
| 2017 | 5.35 | 8.6 | 3.36 |
| 2016 | 11.35 | 15.97 | 8.27 |
| 2015 | 89.48 | 183.92 | 60.85 |
| 2014 | 8.75 | 13.51 | 7.2 |
| 2013 | 9.52 | 14.95 | 7.86 |
| 2012 | 10.09 | 12.57 | 8.27 |
| 2011 | 10.56 | 13.69 | 6.89 |
| 2010 | 23.04 | 32.39 | 13.84 |
| 2009 | 147.91 | 215.84 | 61.64 |
| 2008 | 361.07 | 709.37 | 133.13 |
| 2007 | 19.48 | 28.95 | 6.96 |