| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 24.52 | 148 |
| 2015 | 27.6 | 175 |
| 2014 | 30.9 | 178 |
| 2013 | 33.33 | 182 |
| 2012 | 32.81 | 181 |
| 2011 | 32.94 | 186 |
| 2010 | 32.87 | 184 |
| 2009 | 32.07 | 184 |
| 2008 | 35.59 | 182 |
| 2007 | 32.99 | 186 |
| 2006 | 35.68 | 184 |
| 2005 | 35.25 | 181 |
| 2004 | 30.3 | 183 |
| 2003 | 32.84 | 177 |
| 2002 | 30.54 | 178 |
| 2001 | 30.37 | 172 |
| 2000 | 28.13 | 173 |
| 1999 | 32.32 | 168 |
| 1998 | 34.01 | 165 |
| 1997 | 36.85 | 162 |
| 1996 | 38.33 | 159 |
| 1995 | 36.13 | 161 |
| 1994 | 35.33 | 159 |
| 1993 | 38.75 | 140 |
| 1992 | 37.89 | 139 |
| 1991 | 35.55 | 140 |
| 1990 | 38.91 | 131 |
| 1989 | 35.63 | 125 |
| 1988 | 35.26 | 120 |
| 1987 | 34.24 | 117 |
| 1986 | 34.57 | 110 |