| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2014 | -.64 | 144 |
| 2013 | 3.12 | 86 |
| 2012 | 3.11 | 73 |
| 2011 | 3.1 | 108 |
| 2010 | 12.71 | 17 |
| 2009 | 2.07 | 53 |
| 2008 | 4.37 | 72 |
| 2007 | -4.35 | 160 |
| 2006 | 2.94 | 119 |
| 2005 | 2.5 | 115 |
| 2004 | 1.23 | 140 |
| 2003 | 3.22 | 96 |
| 2002 | 4.66 | 69 |
| 2001 | 7.6 | 30 |
| 2000 | -.03 | 131 |
| 1999 | 2.89 | 86 |
| 1998 | 4.21 | 72 |
| 1997 | -4.96 | 146 |
| 1996 | -3.3 | 141 |
| 1995 | 3.44 | 76 |
| 1994 | -2.58 | 110 |
| 1993 | 11.75 | 11 |
| 1992 | 46.33 | 1 |
| 1991 | -3.25 | 102 |
| 1990 | 2.25 | 61 |
| 1989 | -14.59 | 111 |
| 1988 | -8.01 | 107 |
| 1987 | -16.7 | 108 |
| 1986 | 0.32 | 83 |