| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 25.89 | 167 |
| 2015 | 25.15 | 167 |
| 2014 | 24.55 | 167 |
| 2013 | 24.02 | 167 |
| 2012 | 23.56 | 168 |
| 2011 | 23.19 | 171 |
| 2010 | 22.89 | 171 |
| 2009 | 22.69 | 172 |
| 2008 | 22.58 | 172 |
| 2007 | 22.51 | 172 |
| 2006 | 22.37 | 171 |
| 2005 | 22.1 | 172 |
| 2004 | 21.91 | 172 |
| 2003 | 21.57 | 171 |
| 2002 | 21.11 | 168 |
| 2001 | 20.59 | 169 |
| 2000 | 20.06 | 168 |
| 1999 | 19.68 | 164 |
| 1998 | 19.29 | 165 |
| 1997 | 18.88 | 165 |
| 1996 | 18.44 | 165 |
| 1995 | 17.95 | 164 |
| 1994 | 17.56 | 162 |
| 1993 | 17.16 | 159 |
| 1992 | 16.73 | 159 |
| 1991 | 16.28 | 160 |
| 1990 | 15.8 | 158 |
| 1989 | 15.48 | 155 |
| 1988 | 15.13 | 154 |
| 1987 | 14.8 | 154 |
| 1986 | 14.57 | 152 |