| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 6.66 | 7.16 | 5.92 |
| 2019 | 10.76 | 19.69 | 6.25 |
| 2018 | 24.88 | 48.73 | 13.86 |
| 2017 | 37.8 | 51.71 | 20.7 |
| 2016 | 17.81 | 23.84 | 12.49 |
| 2015 | 29.13 | 52.67 | 18.84 |
| 2014 | 9.72 | 19.86 | 7.42 |
| 2013 | 10.37 | 13.26 | 7.85 |
| 2012 | 20.69 | 28.76 | 11.02 |
| 2011 | 50.43 | 134.86 | 24.2 |
| 2010 | 217.23 | 583.67 | 29.35 |
| 2009 | 567.33 | 616.47 | 521.93 |
| 2008 | 41.28 | 56.21 | 22.52 |
| 2007 | 34.31 | 47.65 | 17.19 |
| 2006 | 16.51 | 22.04 | 13.9 |
| 2005 | 26.02 | 39.56 | 20.05 |
| 2004 | 38.01 | 45.73 | 28.47 |