| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 16.1 | 171 |
| 2015 | 16.32 | 171 |
| 2014 | 16.55 | 170 |
| 2013 | 16.79 | 170 |
| 2012 | 17.03 | 170 |
| 2011 | 17.28 | 171 |
| 2010 | 17.53 | 170 |
| 2009 | 17.78 | 170 |
| 2008 | 18.04 | 171 |
| 2007 | 18.3 | 171 |
| 2006 | 18.56 | 170 |
| 2005 | 18.82 | 170 |
| 2004 | 19.09 | 170 |
| 2003 | 19.36 | 171 |
| 2002 | 19.64 | 172 |
| 2001 | 19.91 | 173 |
| 2000 | 20.19 | 172 |
| 1999 | 20.48 | 173 |
| 1998 | 20.76 | 173 |
| 1997 | 21.05 | 174 |
| 1996 | 21.34 | 174 |
| 1995 | 21.64 | 175 |
| 1994 | 22.26 | 172 |
| 1993 | 23.32 | 171 |
| 1992 | 24.41 | 166 |
| 1991 | 25.55 | 164 |
| 1990 | 26.71 | 161 |
| 1989 | 27.91 | 158 |
| 1988 | 29.13 | 156 |
| 1987 | 30.39 | 155 |
| 1986 | 31.69 | 154 |