| 时间 | 值 | 世界排名 |
|---|---|---|
| 2015 | 3.7 | 85 |
| 2014 | 3.7 | 78 |
| 2013 | 3.9 | 84 |
| 2012 | 3.6 | 97 |
| 2011 | 3.5 | 92 |
| 2010 | 4.8 | 76 |
| 2009 | 5.2 | 69 |
| 2008 | 3.8 | 61 |
| 2007 | 5.2 | 49 |
| 2006 | 5.2 | 40 |
| 2005 | 5.3 | 33 |
| 2004 | 7.3 | 16 |
| 2003 | 8.3 | 15 |
| 2002 | 7.9 | 12 |
| 2001 | 5.4 | 26 |
| 2000 | 5.2 | 26 |
| 1999 | 3.9 | 53 |
| 1998 | 2.9 | 69 |
| 1997 | 3.5 | 56 |
| 1996 | 2.3 | 84 |
| 1995 | 1.4 | 116 |
| 1994 | 2 | 95 |
| 1993 | 1.1 | 116 |
| 1992 | 2.1 | 85 |
| 1991 | 1.4 | 98 |
| 1990 | 1.4 | 92 |
| 1989 | 0.4 | 113 |
| 1988 | 0.6 | 111 |
| 1987 | 0.3 | 116 |
| 1986 | 0.6 | 112 |