| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2013 | -1.55 | 139 |
| 2012 | 4.24 | 43 |
| 2011 | 1.84 | 90 |
| 2010 | 1.96 | 87 |
| 2009 | -2.34 | 109 |
| 2008 | -.59 | 117 |
| 2007 | 1.94 | 101 |
| 2006 | 1.45 | 106 |
| 2005 | 2.87 | 88 |
| 2004 | 4.19 | 63 |
| 2003 | 2.37 | 71 |
| 2002 | 3.7 | 46 |
| 2001 | 0.78 | 89 |
| 2000 | 2.76 | 60 |
| 1999 | 4.88 | 26 |
| 1998 | 3.83 | 49 |
| 1997 | 4.81 | 34 |
| 1996 | 4.98 | 43 |
| 1995 | 4.17 | 38 |
| 1994 | 4.03 | 32 |
| 1993 | 4.11 | 28 |
| 1992 | 3.08 | 28 |
| 1991 | -1.87 | 78 |
| 1990 | 1.15 | 45 |
| 1989 | 0.21 | 63 |
| 1988 | 3.01 | 39 |
| 1987 | 4.77 | 21 |
| 1986 | 3.18 | 36 |