| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 9.63 | 10.42 | 8.56 |
| 2019 | 7.87 | 10.21 | 5.92 |
| 2018 | 9.21 | 15.6 | 5.96 |
| 2017 | 31.08 | 65.5 | 13.11 |
| 2016 | 77.13 | 102.04 | 51.38 |
| 2015 | 109.03 | 204.78 | 79.5 |
| 2014 | 62.44 | 93.2 | 50.24 |
| 2013 | 61.76 | 79.91 | 48.51 |
| 2012 | 57.43 | 78.59 | 36.47 |
| 2011 | 31.86 | 75.56 | 6.3 |
| 2010 | 15.36 | 50.19 | 5.7 |
| 2009 | 25 | 42.87 | 6.96 |
| 2008 | 17.37 | 35.33 | 6.18 |
| 2007 | 26.87 | 42.86 | 15.22 |
| 2006 | 10.56 | 17.62 | 8.36 |
| 2005 | 10.44 | 13.81 | 7.14 |
| 2004 | 15.06 | 18.87 | 12.98 |
| 2003 | 15.87 | 19.82 | 13.17 |
| 2002 | 22.4 | 26.1 | 17.73 |
| 2001 | 31.83 | 40.33 | 22.67 |