| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 0.00 | -23.03 | |
| 2018 | 70.62 | 109.87 | 35.16 |
| 2017 | 0.00 | -21.92 | |
| 2016 | 492.59 | 538.18 | 401.35 |
| 2015 | 0.00 | -22.84 | |
| 2014 | 3,873.91 | 9667.05 | 232.07 |
| 2013 | 0.00 | -20.36 | |
| 2012 | 77.72 | 88.75 | 65.57 |
| 2011 | 115.62 | 180.51 | 66.83 |
| 2010 | 153.92 | 293.54 | 87.56 |
| 2009 | 142.86 | 271.2 | 94.22 |
| 2008 | 188.17 | 342.98 | 80.4 |
| 2007 | 462.72 | 897.04 | 178.5 |
| 2006 | 3,746.35 | 8063.6 | 260.58 |
| 2005 | 153.85 | 176.1 | 103.45 |
| 2004 | 153.39 | 222.33 | 64.79 |
| 2003 | 238.07 | 261.61 | 188.86 |
| 2002 | 234.26 | 293.99 | 155.56 |
| 2001 | 120.40 | 149.43 | 77.78 |