| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 27.84 | 189 |
| 2015 | 27.31 | 189 |
| 2014 | 26.79 | 186 |
| 2013 | 26.27 | 187 |
| 2012 | 25.76 | 187 |
| 2011 | 25.25 | 187 |
| 2010 | 24.75 | 187 |
| 2009 | 24.26 | 189 |
| 2008 | 23.77 | 189 |
| 2007 | 23.29 | 188 |
| 2006 | 22.82 | 189 |
| 2005 | 22.25 | 191 |
| 2004 | 21.69 | 193 |
| 2003 | 21.14 | 194 |
| 2002 | 20.6 | 194 |
| 2001 | 20.07 | 195 |
| 2000 | 19.55 | 195 |
| 1999 | 19.04 | 195 |
| 1998 | 18.54 | 195 |
| 1997 | 18.05 | 197 |
| 1996 | 17.57 | 197 |
| 1995 | 16.96 | 197 |
| 1994 | 16.32 | 199 |
| 1993 | 15.7 | 199 |
| 1992 | 15.11 | 200 |
| 1991 | 14.53 | 201 |
| 1990 | 13.97 | 201 |
| 1989 | 13.43 | 201 |
| 1988 | 12.9 | 201 |
| 1987 | 12.39 | 201 |
| 1986 | 11.91 | 201 |