| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 25.3 | 166 |
| 2015 | 24.8 | 166 |
| 2014 | 24.36 | 166 |
| 2013 | 23.84 | 166 |
| 2012 | 23.3 | 166 |
| 2011 | 22.82 | 169 |
| 2010 | 22.45 | 170 |
| 2009 | 22.3 | 169 |
| 2008 | 22.27 | 170 |
| 2007 | 22.33 | 171 |
| 2006 | 22.45 | 173 |
| 2005 | 22.59 | 173 |
| 2004 | 22.71 | 176 |
| 2003 | 22.89 | 177 |
| 2002 | 23.11 | 180 |
| 2001 | 23.34 | 182 |
| 2000 | 23.56 | 183 |
| 1999 | 23.86 | 186 |
| 1998 | 24.14 | 190 |
| 1997 | 24.4 | 190 |
| 1996 | 24.63 | 192 |
| 1995 | 24.81 | 193 |
| 1994 | 25.01 | 192 |
| 1993 | 25.17 | 192 |
| 1992 | 25.27 | 192 |
| 1991 | 25.31 | 193 |
| 1990 | 25.27 | 193 |
| 1989 | 25.21 | 191 |
| 1988 | 25.07 | 191 |
| 1987 | 24.87 | 191 |
| 1986 | 24.65 | 191 |