| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.75 | 86 |
| 2015 | 1.75 | 104 |
| 2014 | 1.75 | 115 |
| 2013 | 1.75 | 120 |
| 2012 | 1.75 | 128 |
| 2011 | 1.75 | 129 |
| 2010 | 1.75 | 128 |
| 2009 | 1.75 | 136 |
| 2008 | 1.75 | 151 |
| 2007 | 1.75 | 157 |
| 2006 | 1.75 | 154 |
| 2005 | 1.938 | 140 |
| 2004 | 3.646 | 90 |
| 2003 | 5.25 | 67 |
| 2002 | 5.333 | 71 |
| 2001 | 6.25 | 69 |
| 2000 | 7.5 | 72 |
| 1999 | 8.25 | 66 |
| 1998 | 9.125 | 64 |
| 1997 | 12.604 | 46 |
| 1996 | 14.5 | 43 |
| 1995 | 16.583 | 34 |
| 1994 | 12 | 38 |
| 1993 | 8 | 67 |
| 1992 | 8 | 62 |
| 1991 | 8 | 63 |
| 1990 | 8 | 67 |
| 1989 | 8 | 66 |
| 1988 | 4 | 101 |
| 1987 | 4 | 94 |
| 1986 | 4 | 99 |