| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 26.01 | 144 |
| 2015 | 26.09 | 144 |
| 2014 | 26.16 | 144 |
| 2013 | 26.21 | 145 |
| 2012 | 26.26 | 145 |
| 2011 | 26.3 | 147 |
| 2010 | 26.34 | 147 |
| 2009 | 26.38 | 148 |
| 2008 | 26.41 | 148 |
| 2007 | 26.45 | 151 |
| 2006 | 26.49 | 152 |
| 2005 | 26.53 | 152 |
| 2004 | 26.56 | 154 |
| 2003 | 26.6 | 154 |
| 2002 | 26.64 | 156 |
| 2001 | 26.68 | 155 |
| 2000 | 26.68 | 156 |
| 1999 | 26.63 | 157 |
| 1998 | 26.58 | 157 |
| 1997 | 26.52 | 157 |
| 1996 | 26.47 | 157 |
| 1995 | 26.42 | 159 |
| 1994 | 26.37 | 160 |
| 1993 | 26.32 | 161 |
| 1992 | 26.27 | 161 |
| 1991 | 26.22 | 162 |
| 1990 | 26.82 | 160 |
| 1989 | 28.32 | 156 |
| 1988 | 29.86 | 153 |
| 1987 | 31.46 | 150 |
| 1986 | 33.11 | 148 |