| 时间 | 值 | 世界排名 |
|---|---|---|
| 2009 | 2.4 | 131 |
| 2008 | 1.1 | 139 |
| 2007 | 2.2 | 123 |
| 2006 | 2 | 124 |
| 2005 | 2.5 | 106 |
| 2004 | 4.7 | 47 |
| 2003 | 4.3 | 60 |
| 2002 | 5.6 | 36 |
| 2001 | 2.7 | 79 |
| 2000 | 2.6 | 82 |
| 1999 | 3.4 | 61 |
| 1998 | 3.8 | 49 |
| 1997 | 4.8 | 31 |
| 1996 | 7.1 | 11 |
| 1995 | 6.4 | 11 |
| 1994 | 5.4 | 24 |
| 1993 | 5.5 | 19 |
| 1992 | 2.2 | 78 |
| 1991 | 1.5 | 94 |
| 1990 | 0.5 | 112 |
| 1989 | 1.2 | 99 |
| 1988 | 1.3 | 95 |
| 1987 | 2.1 | 80 |
| 1986 | 3.2 | 52 |