| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.603 | 31 |
| 2015 | 5.466 | 37 |
| 2014 | 6.017 | 39 |
| 2013 | 6.39 | 41 |
| 2012 | 6.82 | 41 |
| 2011 | 8.411 | 20 |
| 2010 | 8.414 | 30 |
| 2009 | 5.826 | 34 |
| 2008 | 8.659 | 29 |
| 2007 | 8.999 | 53 |
| 2006 | 7.33 | 61 |
| 2005 | 7.871 | 48 |
| 2004 | 7.11 | 56 |
| 2003 | 6.358 | 48 |
| 2002 | 5.196 | 61 |
| 2001 | 4.886 | 63 |
| 2000 | 5.174 | 66 |
| 1999 | -1.031 | 137 |
| 1998 | -16.462 | 158 |
| 1997 | 5.584 | 57 |
| 1996 | 6.754 | 31 |
| 1995 | 7.606 | 23 |
| 1994 | 7.09 | 26 |
| 1993 | 8.002 | 17 |
| 1992 | 7.21 | 22 |
| 1991 | 6.149 | 29 |
| 1990 | 7.264 | 24 |
| 1989 | 9.313 | 17 |
| 1988 | 6.837 | 23 |
| 1987 | 6.248 | 33 |
| 1986 | 7.042 | 21 |