| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 4.9 | 95 |
| 2015 | 4.5 | 95 |
| 2014 | 4.6 | 94 |
| 2013 | 5.8 | 91 |
| 2012 | 5.8 | 88 |
| 2011 | 6.5 | 90 |
| 2010 | 6.5 | 89 |
| 2009 | 6.3 | 94 |
| 2008 | 7.2 | 95 |
| 2007 | 7.6 | 94 |
| 2006 | 7.2 | 94 |
| 2005 | 6.9 | 93 |
| 2004 | 6.7 | 99 |
| 2003 | 5.8 | 103 |
| 2002 | 5.5 | 106 |
| 2001 | 16.2 | 92 |
| 2000 | 17 | 92 |
| 1999 | 16 | 91 |
| 1998 | 15.6 | 91 |
| 1997 | 17.9 | 89 |
| 1996 | 17.9 | 86 |
| 1995 | 16.9 | 89 |
| 1994 | 16 | 89 |
| 1993 | 18.3 | 83 |
| 1992 | 13.8 | 98 |
| 1991 | 23.9 | 69 |
| 1990 | 11.2 | 96 |
| 1989 | 10.5 | 98 |
| 1988 | 27.9 | 64 |
| 1987 | 5.9 | 106 |
| 1986 | 6.2 | 104 |