| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 7.72 | 9.35 | 6.58 |
| 2019 | 11.4 | 17.54 | 6.87 |
| 2018 | 16.84 | 30.45 | 7.56 |
| 2017 | 74.1 | 173.05 | 38.73 |
| 2016 | 171.73 | 270.02 | 78.73 |
| 2015 | 124.29 | 358.66 | 37.98 |
| 2014 | 129.81 | 172.16 | 81.33 |
| 2013 | 437.06 | 863.39 | 133.3 |
| 2012 | 339.58 | 610.49 | 223.63 |
| 2011 | 126.62 | 372.49 | 42.31 |
| 2010 | 40.49 | 71.17 | 18.5 |
| 2009 | 25.69 | 41.25 | 10.67 |
| 2008 | 38.09 | 148.45 | 7.49 |
| 2007 | 71.41 | 124.7 | 27.29 |
| 2006 | 40.08 | 66.2 | 23.64 |
| 2005 | 27.58 | 33.91 | 20.39 |