| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 26.97 | 37.2 | 20.96 |
| 2018 | 20.54 | 26.98 | 15.35 |
| 2017 | 27.01 | 32.25 | 23.37 |
| 2016 | 19.79 | 26.42 | 15.98 |
| 2015 | 58.78 | 104.42 | 20.26 |
| 2014 | 68.57 | 123.61 | 48.53 |
| 2013 | 76.42 | 108.79 | 54.12 |
| 2012 | 65.34 | 104.85 | 27.53 |
| 2011 | 31.41 | 38.76 | 23.65 |
| 2010 | 35.93 | 56.85 | 23.85 |
| 2009 | 39.46 | 57.93 | 16.26 |
| 2008 | 32.24 | 65.9 | 14.35 |
| 2007 | 54.30 | 126.64 | 17.03 |
| 2006 | 38.76 | 41.4 | 34.48 |
| 2005 | 38.45 | 56.59 | 23.82 |
| 2004 | 45.57 | 66.16 | 19.22 |
| 2003 | 48.81 | 125.9 | 18.48 |
| 2002 | 478.66 | 709.83 | 296.25 |
| 2001 | 0.00 | -27.17 | |
| 2000 | 0.00 | -25.1 | |
| 1999 | 386.61 | 855.73 | 52.06 |
| 1998 | 91.20 | 124.4 | 40.99 |