| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 41.52 | 11 |
| 2015 | 41.65 | 12 |
| 2014 | 26.69 | 88 |
| 2013 | 27.32 | 83 |
| 2012 | 27.93 | 79 |
| 2011 | 28.41 | 80 |
| 2010 | 26.06 | 97 |
| 2009 | 28.48 | 68 |
| 2008 | 28.99 | 77 |
| 2007 | 32.13 | 58 |
| 2006 | 34.26 | 52 |
| 2005 | 34.35 | 43 |
| 2004 | 35.05 | 43 |
| 2003 | 36.48 | 34 |
| 2002 | 39.65 | 23 |
| 2001 | 38.33 | 27 |
| 2000 | 35.42 | 40 |
| 1999 | 35.31 | 30 |
| 1998 | 34.67 | 29 |
| 1997 | 33.39 | 40 |
| 1996 | 31.85 | 54 |
| 1995 | 32.09 | 58 |