| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2013 | 3.554 | 89 |
| 2012 | 5.883 | 55 |
| 2011 | 5.115 | 73 |
| 2010 | -.078 | 160 |
| 2009 | -.85 | 116 |
| 2008 | 6.791 | 50 |
| 2007 | 11.4 | 26 |
| 2006 | 10.999 | 20 |
| 2005 | 12.224 | 12 |
| 2004 | 15.218 | 7 |
| 2003 | -3.593 | 159 |
| 2002 | -3.809 | 160 |
| 2001 | 2.845 | 98 |
| 2000 | 3.394 | 110 |
| 1999 | -4.816 | 150 |
| 1998 | -.112 | 136 |
| 1997 | -.114 | 139 |
| 1996 | -2.671 | 142 |
| 1995 | 2.148 | 91 |
| 1994 | -2.731 | 114 |
| 1993 | -1.315 | 108 |
| 1992 | 5.336 | 43 |
| 1991 | 7.218 | 19 |
| 1990 | 4.057 | 55 |
| 1989 | -6.139 | 105 |
| 1988 | 6.09 | 31 |
| 1987 | 5.519 | 38 |
| 1986 | 5.143 | 32 |