| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2010 | 28.539 | 176 |
| 2009 | 27.432 | 173 |
| 2008 | 27.635 | 170 |
| 2007 | 42.78 | 146 |
| 2006 | 46.259 | 135 |
| 2005 | 43.578 | 138 |
| 2004 | 40.448 | 154 |
| 2003 | 38.437 | 155 |
| 2002 | 35.609 | 160 |
| 2001 | 31.385 | 165 |
| 2000 | 31.24 | 162 |
| 1999 | 27.793 | 156 |
| 1998 | 31.616 | 153 |
| 1997 | 30.401 | 154 |
| 1996 | 17.847 | 158 |
| 1995 | 20.202 | 158 |
| 1994 | 19.332 | 141 |
| 1993 | 16.56 | 137 |
| 1992 | 77.5 | 7 |
| 1991 | 37.288 | 102 |
| 1990 | 40 | 90 |
| 1989 | 39.286 | 81 |
| 1988 | 33.333 | 93 |
| 1987 | 36 | 92 |