| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2018 | 27.41 | 34.71 | 21.03 |
| 2017 | 22.09 | 32.59 | 17.05 |
| 2016 | 17.26 | 21.53 | 13.75 |
| 2015 | 21.74 | 29.22 | 17.47 |
| 2014 | 18.17 | 21.61 | 15.44 |
| 2013 | 21.24 | 32.88 | 11.21 |
| 2012 | 19.79 | 22.67 | 17.29 |
| 2011 | 16.75 | 20.54 | 13.58 |
| 2010 | 34.90 | 47.29 | 27.26 |
| 2009 | 20.91 | 35.24 | 10.13 |
| 2008 | 0.00 | -3.14 | |
| 2007 | 0.00 | -112.06 |