| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 23.83 | 167 |
| 2015 | 24.31 | 176 |
| 2014 | 29.52 | 176 |
| 2013 | 30.17 | 178 |
| 2012 | 30.6 | 177 |
| 2011 | 32.49 | 180 |
| 2010 | 33.38 | 173 |
| 2009 | 29.25 | 177 |
| 2008 | 36.84 | 171 |
| 2007 | 33.09 | 179 |
| 2006 | 34.06 | 176 |
| 2005 | 37.82 | 165 |
| 2004 | 31.97 | 173 |
| 2003 | 29.99 | 170 |
| 2002 | 29.24 | 165 |
| 2001 | 26.87 | 169 |
| 2000 | 26.9 | 170 |
| 1999 | 29.59 | 158 |
| 1998 | 28.69 | 162 |
| 1997 | 32.69 | 156 |
| 1996 | 34.04 | 149 |
| 1995 | 32.23 | 157 |
| 1994 | 31.47 | 150 |
| 1993 | 31.6 | 125 |
| 1992 | 34.49 | 119 |
| 1991 | 33.09 | 115 |
| 1990 | 32.56 | 119 |
| 1989 | 29.5 | 126 |
| 1988 | 28.88 | 123 |
| 1987 | 29.97 | 118 |
| 1986 | 27.46 | 120 |