| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.26 | 74 |
| 2015 | 3.17 | 86 |
| 2014 | 3.84 | 82 |
| 2013 | 5.22 | 54 |
| 2012 | 4.82 | 63 |
| 2011 | 5.44 | 68 |
| 2010 | 4.37 | 94 |
| 2009 | 3.32 | 51 |
| 2008 | 1.98 | 139 |
| 2007 | 7.02 | 69 |
| 2006 | 5.13 | 111 |
| 2005 | -1.96 | 200 |
| 2004 | 3.29 | 148 |
| 2003 | -1.01 | 185 |
| 2002 | 1.05 | 148 |
| 2001 | 2.25 | 119 |
| 2000 | -1.38 | 185 |
| 1999 | 2.97 | 111 |
| 1998 | -1.71 | 175 |
| 1997 | 6.23 | 51 |
| 1996 | 7.88 | 24 |
| 1995 | 4.99 | 69 |
| 1994 | 8.52 | 18 |
| 1993 | 8.21 | 19 |
| 1992 | 7.83 | 28 |
| 1991 | 5.98 | 38 |
| 1990 | -3.04 | 149 |
| 1989 | -4.94 | 157 |
| 1988 | -3.69 | 155 |
| 1987 | 0.9 | 124 |
| 1986 | -.9 | 139 |