| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 19.63 | 7 |
| 2015 | 20.13 | 11 |
| 2014 | 20.94 | 11 |
| 2013 | 5.923 | 114 |
| 2012 | 5.518 | 121 |
| 2011 | 6.388 | 111 |
| 2010 | 9.558 | 83 |
| 2009 | 16.23 | 32 |
| 2008 | 11.853 | 74 |
| 2007 | 10.909 | 80 |
| 2006 | 7.293 | 130 |
| 2005 | 6.107 | 133 |
| 2004 | 7.448 | 116 |
| 2003 | 5.381 | 141 |
| 2002 | 7.968 | 115 |
| 2001 | 11.166 | 93 |
| 2000 | 11.868 | 92 |
| 1999 | 14.202 | 80 |
| 1998 | 14.292 | 84 |
| 1997 | 15.247 | 75 |
| 1996 | 25.779 | 36 |
| 1995 | 34.563 | 25 |
| 1994 | 55.858 | 10 |
| 1993 | 86.358 | 8 |