| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 12.621 | 38 |
| 2015 | 12.488 | 47 |
| 2014 | 11.91 | 50 |
| 2013 | 13.595 | 38 |
| 2012 | 14.808 | 33 |
| 2011 | 14.995 | 33 |
| 2010 | 15.845 | 32 |
| 2009 | 17.866 | 27 |
| 2008 | 18.044 | 25 |
| 2007 | 17.086 | 29 |
| 2006 | 17.06 | 31 |
| 2005 | 17.551 | 35 |
| 2004 | 22.087 | 18 |
| 2003 | 23.755 | 19 |
| 2002 | 23.58 | 23 |
| 2001 | 22.27 | 32 |
| 2000 | 24.667 | 29 |
| 1999 | 29.667 | 24 |
| 1998 | 35.75 | 20 |
| 1997 | 49.775 | 11 |
| 1996 | 58.445 | 10 |