| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.7 | 161 |
| 2015 | -.75 | 165 |
| 2014 | -.8 | 166 |
| 2013 | -.85 | 167 |
| 2012 | -.91 | 168 |
| 2011 | -.97 | 171 |
| 2010 | -1.03 | 176 |
| 2009 | -1.03 | 174 |
| 2008 | -.99 | 175 |
| 2007 | -.86 | 168 |
| 2006 | -.7 | 166 |
| 2005 | -.51 | 158 |
| 2004 | -.33 | 149 |
| 2003 | -.15 | 142 |
| 2002 | -.01 | 136 |
| 2001 | 0.11 | 124 |
| 2000 | 0.06 | 133 |
| 1999 | 0.18 | 124 |
| 1998 | 0.3 | 118 |
| 1997 | 0.46 | 112 |
| 1996 | 0.6 | 107 |
| 1995 | 0.79 | 99 |
| 1994 | 0.94 | 91 |
| 1993 | 0.99 | 95 |
| 1992 | 0.88 | 98 |
| 1991 | 0.66 | 114 |
| 1990 | -2.6 | 192 |
| 1989 | -2.69 | 193 |
| 1988 | -2.62 | 193 |
| 1987 | -2.35 | 190 |
| 1986 | -1.93 | 190 |