| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 30.67 | 35.96 | 25.5 |
| 2019 | 30.76 | 44.05 | 25.31 |
| 2018 | 26.41 | 31.81 | 21.4 |
| 2017 | 21.95 | 26.6 | 18.1 |
| 2016 | 16.64 | 26.86 | 11.05 |
| 2015 | 195.77 | 1138.94 | 4.24 |
| 2014 | 0 | -1.71 | |
| 2013 | 0 | -2.03 | |
| 2012 | 70.42 | 81.98 | 48.79 |
| 2011 | 60.66 | 99.98 | 28.32 |
| 2010 | 75.11 | 104.41 | 57 |
| 2009 | 19.3 | 23.91 | 12.85 |
| 2008 | 29.89 | 73.5 | 7.34 |
| 2007 | 65.69 | 105.66 | 30.05 |
| 2006 | 22.83 | 31.15 | 18.73 |
| 2005 | 19.83 | 24.53 | 14.86 |
| 2004 | 29.37 | 39.57 | 21.99 |
| 2003 | 36.47 | 53.33 | 26.45 |
| 2002 | 74.68 | 88.74 | 54.65 |
| 2001 | 66.07 | 87.17 | 43.08 |