| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 11.401 | 2 |
| 2015 | 8.878 | 9 |
| 2014 | 8.983 | 9 |
| 2013 | 8.965 | 11 |
| 2012 | 7.308 | 36 |
| 2011 | 9.688 | 11 |
| 2010 | 10.412 | 16 |
| 2009 | -1.877 | 132 |
| 2008 | 12.466 | 14 |
| 2007 | 13.919 | 14 |
| 2006 | 9.505 | 32 |
| 2005 | 8.014 | 46 |
| 2004 | 7.478 | 50 |
| 2003 | 3.257 | 108 |
| 2002 | 3.175 | 93 |
| 2001 | 5.244 | 50 |
| 2000 | 5.301 | 60 |
| 1999 | 4.855 | 55 |
| 1998 | 5.493 | 40 |
| 1997 | 5.318 | 61 |
| 1996 | 4.788 | 60 |
| 1995 | -.509 | 111 |
| 1994 | -3.123 | 116 |
| 1993 | -2.031 | 112 |
| 1992 | -5.407 | 116 |
| 1991 | -6.17 | 115 |
| 1990 | -8.359 | 110 |
| 1989 | -.338 | 91 |
| 1988 | 3.017 | 64 |