| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 22.48 | 110 |
| 2014 | 23.24 | 106 |
| 2013 | 23.57 | 109 |
| 2012 | 25.07 | 98 |
| 2011 | 23.36 | 115 |
| 2010 | 24.07 | 108 |
| 2009 | 23.32 | 104 |
| 2008 | 22.75 | 113 |
| 2007 | 23.23 | 114 |
| 2006 | 24.24 | 110 |
| 2005 | 26.82 | 93 |
| 2004 | 25.06 | 108 |
| 2003 | 25.72 | 100 |
| 2002 | 21.91 | 124 |
| 2001 | 26.88 | 90 |
| 2000 | 24.95 | 103 |
| 1999 | 28.78 | 73 |
| 1998 | 26.57 | 89 |
| 1997 | 26.64 | 93 |
| 1996 | 29.8 | 74 |
| 1995 | 31.93 | 62 |
| 1994 | 33.38 | 44 |