| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 25.23 | 20 |
| 2015 | 25.11 | 24 |
| 2014 | 24.87 | 24 |
| 2013 | 24.81 | 25 |
| 2012 | 24.55 | 27 |
| 2011 | 26.02 | 25 |
| 2010 | 24.29 | 30 |
| 2009 | 23.91 | 35 |
| 2008 | 23.11 | 39 |
| 2007 | 23.06 | 38 |
| 2006 | 23.01 | 40 |
| 2005 | 21.47 | 44 |
| 2004 | 22.18 | 44 |
| 2003 | 23.36 | 42 |
| 2002 | 23.35 | 44 |
| 2001 | 24.09 | 40 |
| 2000 | 25.93 | 37 |
| 1999 | 27.03 | 37 |
| 1998 | 27.31 | 39 |
| 1997 | 26.7 | 40 |
| 1996 | 25.48 | 42 |
| 1995 | 26.14 | 43 |
| 1994 | 25.55 | 42 |
| 1993 | 24.99 | 44 |
| 1992 | 26.35 | 45 |
| 1991 | 25.77 | 43 |
| 1990 | 25.98 | 44 |
| 1989 | 26.95 | 37 |
| 1988 | 26.02 | 37 |
| 1987 | 26.25 | 39 |
| 1986 | 27.62 | 31 |