| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 0 | -11.62 | |
| 2019 | 39.66 | 53.39 | 31.41 |
| 2018 | 33.21 | 40.73 | 24.54 |
| 2017 | 21.62 | 34.42 | 15.25 |
| 2016 | 22 | 29.81 | 16.42 |
| 2015 | 34.25 | 58.69 | 24.09 |
| 2014 | 17.2 | 28.43 | 11.25 |
| 2013 | 17.07 | 24.81 | 11.91 |
| 2012 | 15 | 22.83 | 8.38 |
| 2011 | 11.87 | 19.64 | 7.83 |
| 2010 | 45.03 | 149 | 12.37 |
| 2009 | 799.28 | 3494.87 | 16.38 |
| 2008 | 21.02 | 35.25 | 11.96 |
| 2007 | 26.09 | 42.11 | 10.36 |
| 2006 | 8.14 | 10.38 | 6.55 |
| 2005 | 8.06 | 9.67 | 5.48 |
| 2004 | 13.63 | 21.83 | 4.87 |
| 2003 | 20.71 | 27.09 | 16.03 |
| 2002 | 29.84 | 35.96 | 24.25 |