| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 10.69 | 12.83 | 6.97 |
| 2019 | 11.89 | 15.35 | 8.71 |
| 2018 | 11.2 | 16.7 | 8.42 |
| 2017 | 22.26 | 29.24 | 15.54 |
| 2016 | 21.06 | 25.81 | 17.42 |
| 2015 | 21.67 | 48.74 | 13.97 |
| 2014 | 13.19 | 19.49 | 10.66 |
| 2013 | 14.51 | 17.71 | 11.72 |
| 2012 | 11.16 | 12.96 | 8.87 |
| 2011 | 11.37 | 13.88 | 9.09 |
| 2010 | 17.4 | 24.94 | 12.6 |
| 2009 | 15.59 | 18.83 | 12.67 |
| 2008 | 18.3 | 29.66 | 11.16 |
| 2007 | 27.65 | 43.74 | 20.8 |
| 2006 | 31.21 | 40.77 | 21.25 |
| 2005 | 29.26 | 37.92 | 23.49 |