| 时间 | 值 | 世界排名 |
|---|---|---|
| 2013 | 31.7 | 3 |
| 2012 | 40.5 | 1 |
| 2011 | 79.2 | 1 |
| 2010 | 38.6 | 1 |
| 2009 | 43 | 1 |
| 2008 | 38.7 | 1 |
| 2007 | 43.8 | 1 |
| 2006 | 40.2 | 1 |
| 2005 | 32.1 | 1 |
| 2004 | 27.5 | 1 |
| 2003 | 26 | 1 |
| 2002 | 18.2 | 2 |
| 2001 | 25.9 | 2 |
| 2000 | 26.7 | 1 |
| 1999 | 18.7 | 2 |
| 1998 | 17.5 | 2 |
| 1992 | 9.6 | 2 |
| 1991 | 7.4 | 7 |
| 1990 | 9.2 | 3 |
| 1989 | 8.3 | 7 |
| 1988 | 8.9 | 5 |
| 1987 | 12.8 | 3 |
| 1986 | 14.6 | 1 |