| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 13.93 | 18.65 | 10.15 |
| 2018 | 17.27 | 24.48 | 14.96 |
| 2017 | 39.30 | 87.91 | 17.93 |
| 2016 | 326.47 | 951.32 | 81.74 |
| 2015 | 130.09 | 223.4 | 76.1 |
| 2014 | 42.06 | 76.1 | 21.4 |
| 2013 | 49.79 | 170.16 | 23.28 |
| 2012 | 60.65 | 79.6 | 40.95 |
| 2011 | 113.34 | 220.95 | 51.55 |
| 2010 | 779.61 | 1855.35 | 50.64 |
| 2009 | 38.64 | 58.17 | 21.86 |
| 2008 | 46.21 | 103.29 | 17.99 |
| 2007 | 94.97 | 154.99 | 40.49 |
| 2006 | 82.71 | 153.5 | 34.31 |
| 2005 | 0.00 | -0.93 | |
| 2004 | 42.42 | 53.83 | 24.9 |
| 2003 | 104.72 | 153.39 | 26.19 |
| 2002 | 80.24 | 92.56 | 67.32 |
| 2001 | 49.32 | 59.1 | 41.9 |
| 2000 | 62.94 | 79.59 | 38.08 |
| 1999 | 51.20 | 63.43 | 40.45 |
| 1998 | 32.93 | 45.78 | 23.66 |