| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 14.276 | 27 |
| 2015 | 14.149 | 36 |
| 2014 | 11.013 | 56 |
| 2013 | 12.294 | 49 |
| 2012 | 13.418 | 48 |
| 2011 | 14.438 | 36 |
| 2010 | 16.36 | 29 |
| 2009 | 20.544 | 16 |
| 2008 | 21.064 | 13 |
| 2007 | 18.825 | 22 |
| 2006 | 18.128 | 23 |
| 2005 | 19.261 | 23 |
| 2004 | 20.938 | 23 |
| 2003 | 19.289 | 28 |
| 2002 | 23.522 | 24 |
| 2001 | 28.694 | 15 |
| 2000 | 33.777 | 14 |
| 1999 | 35.535 | 17 |
| 1998 | 30.825 | 25 |
| 1997 | 33.325 | 18 |
| 1996 | 36.667 | 21 |