| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 171.04 | 186.66 | 159.34 |
| 2018 | 238.02 | 326.94 | 140.59 |
| 2017 | 3,053.39 | 5709.61 | 721.1 |
| 2016 | 648.93 | 1232.46 | 270.51 |
| 2015 | 408.40 | 626.84 | 165.23 |
| 2014 | 317.21 | 666.48 | 175.56 |
| 2013 | 435.90 | 481.36 | 383.02 |
| 2012 | 365.12 | 603.41 | 72.59 |
| 2011 | 164.58 | 205.24 | 79.45 |
| 2010 | 0.00 | -117.9 | |
| 2009 | 1,358.46 | 1565.24 | 1077.04 |
| 2008 | 2,329.31 | 14483.3 | 37.25 |
| 2007 | 54.70 | 63.09 | 38.85 |
| 2006 | 0.00 | -6.84 | |
| 2005 | 248.67 | 276.63 | 201.59 |
| 2004 | 408.68 | 735.22 | 123.62 |
| 2003 | 179.05 | 264.26 | 90.32 |
| 2002 | 245.00 | 498.27 | 89.44 |
| 2001 | 0.00 | -16.29 | |
| 2000 | 0.00 | -5.89 | |
| 1999 | 0.00 | -3.72 | |
| 1998 | 0.00 | -3.47 |