| 时间 | 值 | 世界排名 |
|---|---|---|
| 2009 | 3.8 | 100 |
| 2008 | 4.4 | 102 |
| 2007 | 4.2 | 100 |
| 2006 | 4.1 | 99 |
| 2005 | 4.3 | 99 |
| 2004 | 4.5 | 106 |
| 2003 | 23.2 | 82 |
| 2002 | 11.7 | 95 |
| 2001 | 13.3 | 95 |
| 2000 | 14.5 | 95 |
| 1999 | 13.3 | 103 |
| 1998 | 12.4 | 104 |
| 1997 | 8.3 | 111 |
| 1996 | 4.3 | 114 |
| 1995 | 4.2 | 111 |
| 1994 | 3.8 | 114 |
| 1993 | 3.6 | 114 |
| 1992 | 2.8 | 118 |
| 1991 | 2.6 | 115 |
| 1990 | 2.6 | 118 |
| 1989 | 9.4 | 101 |
| 1988 | 2.4 | 117 |
| 1987 | 2.2 | 120 |
| 1986 | 2.6 | 112 |