| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 24.88 | 38 |
| 2015 | 24.87 | 39 |
| 2014 | 24.92 | 39 |
| 2013 | 24.96 | 39 |
| 2012 | 25 | 39 |
| 2011 | 25.12 | 39 |
| 2010 | 25.37 | 39 |
| 2009 | 25.7 | 38 |
| 2008 | 26.15 | 39 |
| 2007 | 26.71 | 39 |
| 2006 | 27.32 | 41 |
| 2005 | 27.91 | 41 |
| 2004 | 28.61 | 41 |
| 2003 | 29.31 | 41 |
| 2002 | 29.98 | 40 |
| 2001 | 30.57 | 38 |
| 2000 | 31.07 | 39 |
| 1999 | 31.36 | 39 |
| 1998 | 31.64 | 38 |
| 1997 | 31.99 | 36 |
| 1996 | 32.49 | 37 |
| 1995 | 33.18 | 39 |
| 1994 | 33.77 | 40 |
| 1993 | 34.35 | 41 |
| 1992 | 34.91 | 41 |
| 1991 | 35.37 | 41 |
| 1990 | 35.67 | 39 |