| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 7.88 | 9.85 | 6.71 |
| 2018 | 16.00 | 35.29 | 7.22 |
| 2017 | 178.14 | 353.72 | 29.58 |
| 2016 | 76.59 | 100.79 | 64.97 |
| 2015 | 78.48 | 141.59 | 54.15 |
| 2014 | 24.93 | 64.62 | 7.22 |
| 2013 | 10.65 | 13.36 | 7.5 |
| 2012 | 13.09 | 18.08 | 9.41 |
| 2011 | 17.28 | 21.92 | 14.04 |
| 2010 | 15.93 | 22.14 | 11 |
| 2009 | 13.09 | 18.05 | 6.62 |
| 2008 | 21.21 | 42.95 | 5.6 |
| 2007 | 25.60 | 44.74 | 14.85 |
| 2006 | 10.17 | 15.29 | 8.62 |
| 2005 | 11.69 | 16.85 | 7.71 |
| 2004 | 23.02 | 35.03 | 15.8 |
| 2003 | 26.73 | 36.63 | 20.65 |
| 2002 | 66.58 | 89.52 | 54.07 |
| 2001 | 540.89 | 599.02 | 500.68 |
| 2000 | 67.19 | 94 | 41.75 |
| 1999 | 33.11 | 49.6 | 21.68 |