| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2019 | 18.75 | 24.92 | 14.73 |
| 2018 | 24.50 | 43.21 | 14.22 |
| 2017 | 30.00 | 38.67 | 22.75 |
| 2016 | 22.59 | 26.85 | 19.19 |
| 2015 | 22.70 | 33.54 | 16.42 |
| 2014 | 15.66 | 19.04 | 13.45 |
| 2013 | 19.67 | 27.09 | 15.61 |
| 2012 | 28.11 | 42.73 | 17.79 |
| 2011 | 41.01 | 57.72 | 25.95 |
| 2010 | 58.50 | 73.05 | 45.39 |
| 2009 | 32.28 | 48.1 | 18.95 |
| 2008 | 31.29 | 59.28 | 12.74 |
| 2007 | 42.76 | 56.25 | 30.88 |
| 2006 | 17.88 | 22.45 | 15.82 |
| 2005 | 17.50 | 21.24 | 14.63 |
| 2004 | 25.63 | 40.98 | 19.17 |
| 2003 | 26.49 | 31.2 | 21.13 |
| 2002 | 46.67 | 59.86 | 29.41 |
| 2001 | 39.70 | 53.41 | 24.22 |
| 2000 | 72.70 | 114.94 | 40.16 |