| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 19.04 | 30.32 | 10.45 |
| 2018 | 15.33 | 23.29 | 9.91 |
| 2017 | 34.15 | 54.12 | 20.7 |
| 2016 | 753.24 | 911.65 | 607.77 |
| 2015 | 350.22 | 1040.8 | 72.33 |
| 2014 | 149.94 | 387.01 | 55.44 |
| 2013 | 738.23 | 1726.84 | 352.94 |
| 2012 | 78.39 | 90.48 | 60.45 |
| 2011 | 119.08 | 158.44 | 67.51 |
| 2010 | 132.07 | 280.41 | 99.72 |
| 2009 | 352.79 | 550.92 | 241.12 |
| 2008 | 304.96 | 545.32 | 151.91 |
| 2007 | 367.41 | 780.43 | 128.68 |
| 2006 | 214.53 | 387.63 | 96.09 |
| 2005 | 64.03 | 103.8 | 39.79 |
| 2004 | 158.58 | 484.15 | 73.18 |
| 2003 | 412.07 | 544.05 | 345.38 |
| 2002 | 1,436.98 | 4381.81 | 81.53 |
| 2001 | 91.26 | 118.38 | 71.28 |