| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 22.37 | 26 |
| 2015 | 22.51 | 26 |
| 2014 | 22.38 | 26 |
| 2013 | 22.22 | 27 |
| 2012 | 22.02 | 26 |
| 2011 | 21.76 | 22 |
| 2010 | 21.43 | 17 |
| 2009 | 21.29 | 14 |
| 2008 | 21.13 | 14 |
| 2007 | 20.99 | 12 |
| 2006 | 20.86 | 9 |
| 2005 | 20.72 | 5 |
| 2004 | 20.76 | 4 |
| 2003 | 20.82 | 2 |
| 2002 | 20.93 | 1 |
| 2001 | 21.15 | 2 |
| 2000 | 21.52 | 2 |
| 1999 | 21.89 | 2 |
| 1998 | 22.39 | 3 |
| 1997 | 23 | 3 |
| 1996 | 23.7 | 4 |
| 1995 | 24.46 | 4 |
| 1994 | 25.4 | 5 |
| 1993 | 26.49 | 9 |
| 1992 | 27.68 | 11 |
| 1991 | 28.88 | 16 |
| 1990 | 30.02 | 19 |
| 1989 | 31.29 | 23 |
| 1988 | 32.49 | 26 |
| 1987 | 33.63 | 28 |
| 1986 | 34.82 | 31 |