| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 19.39 | 22.69 | 17.13 |
| 2019 | 16.44 | 21.21 | 11.2 |
| 2018 | 17.21 | 25.71 | 10.24 |
| 2017 | 43.44 | 65.67 | 17.64 |
| 2016 | 70.2 | 79.17 | 58.61 |
| 2015 | 70.21 | 131.47 | 33.44 |
| 2014 | 34.04 | 39.64 | 28.46 |
| 2013 | 25.28 | 35.69 | 14.85 |
| 2012 | 24.6 | 38.94 | 14.59 |
| 2011 | 48.84 | 110.9 | 15.99 |
| 2010 | 21.45 | 42.44 | 11.48 |
| 2009 | 18.05 | 24.61 | 13.77 |
| 2008 | 201.22 | 261.48 | 156.09 |
| 2007 | 183.91 | 354.19 | 40.15 |
| 2006 | 41.36 | 51.33 | 29.1 |
| 2005 | 50.42 | 75.96 | 36.28 |
| 2004 | 86.07 | 116.45 | 67.45 |
| 2003 | 84.23 | 113.43 | 55.73 |
| 2002 | 71.85 | 135.7 | 44.71 |
| 2001 | 0 | -19.32 | |
| 2000 | 0 | -14.61 | |
| 1999 | 115.2 | 162.88 | 92.53 |
| 1998 | 34.05 | 46.2 | 28.23 |