| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 35.1 | 38.93 | 32.06 |
| 2019 | 48.03 | 90.1 | 34.71 |
| 2018 | 144.66 | 437.35 | 61.72 |
| 2017 | 413.95 | 1071.7 | 104.67 |
| 2016 | 50.55 | 130.37 | 25.22 |
| 2015 | 37.17 | 56.81 | 22.16 |
| 2014 | 19.12 | 25.22 | 16.49 |
| 2013 | 28.63 | 43.69 | 20.25 |
| 2012 | 51.5 | 72.51 | 36.42 |
| 2011 | 103.34 | 137.01 | 65.61 |
| 2010 | 50.42 | 112.81 | 7.08 |
| 2009 | 9.57 | 19.3 | 5.84 |
| 2008 | 31.02 | 66.58 | 12.46 |
| 2007 | 40.51 | 75.26 | 28.58 |
| 2006 | 19.66 | 30.64 | 15.2 |
| 2005 | 24.49 | 27.89 | 21.79 |
| 2004 | 28.93 | 39.7 | 24.66 |
| 2003 | 28.78 | 35.29 | 26.07 |