| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 22.28 | 25 |
| 2015 | 22.37 | 25 |
| 2014 | 22.42 | 27 |
| 2013 | 22.66 | 30 |
| 2012 | 22.98 | 31 |
| 2011 | 23.15 | 32 |
| 2010 | 23.05 | 31 |
| 2009 | 23.14 | 31 |
| 2008 | 23.06 | 28 |
| 2007 | 22.92 | 23 |
| 2006 | 23.01 | 21 |
| 2005 | 23.47 | 20 |
| 2004 | 23.82 | 18 |
| 2003 | 24.39 | 19 |
| 2002 | 25.07 | 18 |
| 2001 | 25.59 | 18 |
| 2000 | 25.81 | 15 |
| 1999 | 26.1 | 15 |
| 1998 | 26.29 | 15 |
| 1997 | 26.46 | 15 |
| 1996 | 26.73 | 16 |
| 1995 | 27.17 | 17 |
| 1994 | 27.49 | 17 |
| 1993 | 27.84 | 14 |
| 1992 | 28.19 | 14 |
| 1991 | 28.51 | 12 |
| 1990 | 28.83 | 13 |
| 1989 | 29.24 | 14 |
| 1988 | 29.62 | 14 |
| 1987 | 29.97 | 14 |
| 1986 | 30.23 | 13 |