| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 22.15 | 22 |
| 2015 | 22 | 23 |
| 2014 | 21.91 | 23 |
| 2013 | 21.88 | 22 |
| 2012 | 21.91 | 25 |
| 2011 | 22 | 23 |
| 2010 | 22.12 | 23 |
| 2009 | 22.39 | 22 |
| 2008 | 22.73 | 22 |
| 2007 | 23.12 | 25 |
| 2006 | 23.55 | 26 |
| 2005 | 23.99 | 25 |
| 2004 | 24.42 | 24 |
| 2003 | 24.85 | 21 |
| 2002 | 25.25 | 20 |
| 2001 | 25.61 | 19 |
| 2000 | 25.95 | 16 |
| 1999 | 26.12 | 16 |
| 1998 | 26.26 | 14 |
| 1997 | 26.33 | 14 |
| 1996 | 26.27 | 13 |
| 1995 | 26.09 | 8 |
| 1994 | 25.9 | 7 |
| 1993 | 25.6 | 6 |
| 1992 | 25.26 | 5 |
| 1991 | 25.01 | 5 |
| 1990 | 24.92 | 5 |
| 1989 | 24.95 | 6 |
| 1988 | 25.13 | 4 |
| 1987 | 25.42 | 4 |
| 1986 | 25.76 | 4 |