| 时间 | 值 | 世界排名 |
|---|---|---|
| 2015 | 3.6 | 86 |
| 2014 | 3.2 | 93 |
| 2013 | 3.8 | 87 |
| 2012 | 4.2 | 78 |
| 2011 | 3.8 | 86 |
| 2010 | 5.8 | 49 |
| 2009 | 5.4 | 64 |
| 2008 | 2.6 | 99 |
| 2007 | 3.1 | 93 |
| 2006 | 2.8 | 103 |
| 2005 | 3.1 | 82 |
| 2004 | 4.7 | 48 |
| 1999 | 5.7 | 26 |
| 1998 | 5.7 | 18 |
| 1997 | 5.3 | 20 |
| 1996 | 5.7 | 15 |
| 1995 | 5.5 | 17 |
| 1994 | 6 | 18 |
| 1993 | 4.7 | 30 |
| 1992 | 5.1 | 22 |
| 1991 | 7.1 | 8 |
| 1990 | 8.6 | 5 |
| 1989 | 7.5 | 9 |
| 1988 | 6.8 | 11 |
| 1987 | 6.1 | 17 |
| 1986 | 5 | 28 |