| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.73 | 112 |
| 2015 | -.42 | 144 |
| 2014 | -.19 | 156 |
| 2013 | 0.38 | 161 |
| 2012 | 0.46 | 173 |
| 2011 | 2.02 | 162 |
| 2010 | 0.36 | 171 |
| 2009 | 1.04 | 130 |
| 2008 | 2.08 | 172 |
| 2007 | 0.97 | 164 |
| 2006 | 0.16 | 172 |
| 2005 | 1.24 | 160 |
| 2004 | 0.81 | 150 |
| 2003 | 0.3 | 155 |
| 2002 | -2.31 | 167 |
| 2001 | 0.6 | 156 |
| 2000 | 1.56 | 125 |
| 1999 | -.42 | 148 |
| 1998 | -.44 | 157 |
| 1997 | 1.71 | 138 |
| 1996 | 2 | 139 |
| 1995 | 5.97 | 106 |
| 1994 | 2.46 | 127 |
| 1993 | 4.25 | 99 |
| 1992 | 1.28 | 127 |
| 1991 | 1.6 | 127 |
| 1990 | 2.14 | 122 |
| 1989 | 1.3 | 118 |
| 1988 | 1.19 | 114 |
| 1987 | 1.25 | 104 |
| 1986 | 1.78 | 96 |