| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 8.97 | 10.32 | 7.82 |
| 2019 | 11.06 | 13.47 | 9.36 |
| 2018 | 14.35 | 18.94 | 9.82 |
| 2017 | 14.05 | 16.21 | 12.29 |
| 2016 | 16.29 | 19.26 | 13.83 |
| 2015 | 26.53 | 38.08 | 19.97 |
| 2014 | 79.99 | 397.96 | 26.59 |
| 2013 | 25.11 | 41.59 | 17.88 |
| 2012 | 21.26 | 27.05 | 17.07 |
| 2011 | 35.51 | 54.04 | 21.65 |
| 2010 | 42.91 | 62.85 | 31.05 |
| 2009 | 36.04 | 57.06 | 14.91 |
| 2008 | 20.55 | 34.41 | 10.5 |
| 2007 | 25.81 | 35.01 | 11.75 |
| 2006 | 10.71 | 12.4 | 9.36 |
| 2005 | 11.17 | 16.24 | 8.8 |
| 2004 | 18.8 | 23.4 | 15.77 |
| 2003 | 23.57 | 35.58 | 15.08 |
| 2002 | 34.09 | 42.96 | 25.9 |
| 2001 | 63.52 | 83.27 | 48.11 |