| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2020 | 12.14 | 13.03 | 10.2 |
| 2019 | 12.9 | 16.25 | 10.27 |
| 2018 | 13.61 | 25.9 | 7.49 |
| 2017 | 17.15 | 39.16 | 6.36 |
| 2016 | 33.08 | 42.32 | 18.78 |
| 2015 | 27.07 | 40.81 | 15.12 |
| 2014 | 19.32 | 24.6 | 15.91 |
| 2013 | 305.17 | 714.05 | 33.48 |
| 2012 | 93.44 | 299.8 | 29.13 |
| 2011 | 148.9 | 300.41 | 69.72 |
| 2010 | 131.33 | 1365.19 | 52.41 |
| 2009 | 200.49 | 969.08 | 19.39 |
| 2008 | 69.62 | 164.48 | 15.63 |
| 2007 | 204.95 | 397.19 | 79.79 |
| 2006 | 361.26 | 1036.22 | 21.41 |
| 2005 | 24.88 | 33.52 | 17.57 |
| 2004 | 46.02 | 70.76 | 30.03 |
| 2003 | 53.79 | 65.17 | 41.45 |
| 2002 | 57.96 | 66.13 | 44.11 |
| 2001 | 90.39 | 112.47 | 75.94 |
| 2000 | 69.25 | 87.02 | 53.93 |
| 1999 | 67.42 | 91 | 48.25 |