| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.78 | 167 |
| 2015 | -.81 | 168 |
| 2014 | -.83 | 167 |
| 2013 | -.85 | 166 |
| 2012 | -.86 | 165 |
| 2011 | -.87 | 165 |
| 2010 | -.86 | 169 |
| 2009 | -.87 | 169 |
| 2008 | -.89 | 172 |
| 2007 | -.9 | 172 |
| 2006 | -.91 | 172 |
| 2005 | -.94 | 174 |
| 2004 | -.95 | 175 |
| 2003 | -.95 | 173 |
| 2002 | -.96 | 176 |
| 2001 | -.92 | 178 |
| 2000 | -.87 | 178 |
| 1999 | -.83 | 179 |
| 1998 | -.77 | 174 |
| 1997 | -.73 | 173 |
| 1996 | -.67 | 169 |
| 1995 | -.62 | 168 |
| 1994 | -.56 | 165 |
| 1993 | -.5 | 166 |
| 1992 | 0.57 | 111 |
| 1991 | 0.85 | 101 |
| 1990 | 0.88 | 98 |
| 1989 | 0.92 | 103 |
| 1988 | 0.94 | 100 |
| 1987 | 0.93 | 103 |
| 1986 | 0.9 | 103 |