| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.56 | 103 |
| 2015 | -1.06 | 133 |
| 2014 | 0.81 | 108 |
| 2013 | 1.51 | 96 |
| 2012 | 2.28 | 89 |
| 2011 | 2.2 | 78 |
| 2010 | 3.92 | 55 |
| 2009 | 2.95 | 98 |
| 2008 | 2.04 | 110 |
| 2007 | 4.07 | 77 |
| 2006 | 3.56 | 83 |
| 2005 | 2.01 | 96 |
| 2004 | 3.88 | 66 |
| 2003 | 1.6 | 92 |
| 2002 | 3.82 | 66 |
| 2001 | 2.62 | 92 |
| 2000 | 0.4 | 103 |
| 1999 | 1.69 | 90 |
| 1998 | 3.22 | 62 |
| 1997 | 1.25 | 88 |
| 1996 | -1.83 | 109 |
| 1995 | 1.35 | 68 |
| 1994 | 0.33 | 78 |
| 1993 | 2.31 | 61 |
| 1992 | 2.84 | 50 |
| 1991 | -2.89 | 97 |
| 1990 | -9.76 | 92 |
| 1989 | 18.51 | 5 |
| 1988 | -1.28 | 78 |
| 1987 | 20.79 | 4 |
| 1986 | 19.92 | 4 |