| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 13.2 | 15.55 | 11.7 |
| 2019 | 13.38 | 17.43 | 10.1 |
| 2018 | 17.68 | 23.94 | 13.75 |
| 2017 | 23.47 | 25.11 | 21.88 |
| 2016 | 27.18 | 39.46 | 18.71 |
| 2015 | 26.23 | 33.14 | 17.8 |
| 2014 | 27.25 | 31.76 | 24.31 |
| 2013 | 25.98 | 32 | 20.6 |
| 2012 | 23.13 | 30.19 | 13.92 |
| 2011 | 61.69 | 180.92 | 16.43 |
| 2010 | 94.88 | 114.09 | 58.76 |
| 2009 | 55.27 | 72.95 | 31.04 |
| 2008 | 41.15 | 69.34 | 24.4 |
| 2007 | 47.26 | 71.68 | 26.42 |
| 2006 | 27.86 | 31.72 | 24.16 |
| 2005 | 25.57 | 30.25 | 22.72 |