| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 21.08 | 159 |
| 2015 | 21.39 | 159 |
| 2014 | 21.72 | 158 |
| 2013 | 22.05 | 158 |
| 2012 | 22.38 | 158 |
| 2011 | 22.73 | 159 |
| 2010 | 23.09 | 158 |
| 2009 | 23.45 | 158 |
| 2008 | 23.82 | 157 |
| 2007 | 24.2 | 157 |
| 2006 | 24.58 | 157 |
| 2005 | 24.97 | 157 |
| 2004 | 25.36 | 157 |
| 2003 | 25.75 | 157 |
| 2002 | 26.15 | 158 |
| 2001 | 26.55 | 157 |
| 2000 | 26.96 | 154 |
| 1999 | 27.37 | 154 |
| 1998 | 27.78 | 153 |
| 1997 | 28.2 | 153 |
| 1996 | 28.62 | 152 |
| 1995 | 29.05 | 151 |
| 1994 | 29.48 | 151 |
| 1993 | 29.91 | 150 |
| 1992 | 30.3 | 151 |
| 1991 | 30.7 | 150 |
| 1990 | 31.1 | 150 |
| 1989 | 31.5 | 149 |
| 1988 | 31.91 | 149 |
| 1987 | 32.31 | 149 |
| 1986 | 32.72 | 150 |