| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | -.91 | 122 |
| 2014 | 0.08 | 114 |
| 2013 | -.61 | 127 |
| 2012 | 5.45 | 28 |
| 2011 | -.02 | 116 |
| 2010 | 0.29 | 121 |
| 2009 | -.29 | 76 |
| 2008 | 4.36 | 55 |
| 2007 | 2.59 | 88 |
| 2006 | 1.21 | 109 |
| 2005 | 2.65 | 92 |
| 2004 | -2.12 | 137 |
| 2003 | 1.47 | 91 |
| 2002 | 0.91 | 93 |
| 2001 | -2.79 | 124 |
| 2000 | -.93 | 99 |
| 1999 | 1.51 | 75 |
| 1998 | 9.25 | 15 |
| 1997 | -7.81 | 122 |
| 1996 | 9.52 | 13 |
| 1995 | -3.98 | 109 |
| 1994 | 8.66 | 8 |
| 1993 | -5.01 | 95 |
| 1992 | -7.31 | 96 |
| 1991 | -7.32 | 95 |
| 1990 | 5.78 | 17 |
| 1989 | 16.19 | 4 |
| 1988 | -14.92 | 86 |
| 1987 | -8.65 | 82 |
| 1986 | 24.52 | 2 |