| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 18.94 | 26.12 | 15.22 |
| 2018 | 23.47 | 30.26 | 15.8 |
| 2017 | 27.35 | 35.62 | 20.79 |
| 2016 | 28.65 | 32.68 | 23.98 |
| 2015 | 38.72 | 60.37 | 27.94 |
| 2014 | 26.38 | 35.28 | 20.28 |
| 2013 | 102.72 | 236.15 | 29.2 |
| 2012 | 29.94 | 52.37 | 19.15 |
| 2011 | 65.51 | 98.1 | 32.91 |
| 2010 | 93.32 | 128.9 | 67.57 |
| 2009 | 62.39 | 109.98 | 14.55 |
| 2008 | 52.69 | 227.85 | 10.5 |
| 2007 | 140.32 | 217.12 | 70.75 |
| 2006 | 45.93 | 68.15 | 28.63 |
| 2005 | 35.76 | 46.69 | 26.4 |
| 2004 | 30.20 | 39.21 | 17.5 |
| 2003 | 35.56 | 42.07 | 24.97 |
| 2002 | 40.32 | 46.07 | 35.32 |
| 2001 | 66.55 | 79.55 | 49.14 |