| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.28 | 204 |
| 2015 | -.24 | 202 |
| 2014 | -.23 | 197 |
| 2013 | -.28 | 197 |
| 2012 | -.08 | 189 |
| 2011 | 0.32 | 174 |
| 2010 | 0.6 | 164 |
| 2009 | 0.74 | 154 |
| 2008 | 0.75 | 161 |
| 2007 | 0.75 | 159 |
| 2006 | 0.8 | 153 |
| 2005 | 0.8 | 154 |
| 2004 | 0.77 | 157 |
| 2003 | 0.76 | 156 |
| 2002 | 0.9 | 153 |
| 2001 | 0.79 | 157 |
| 2000 | 0.57 | 167 |
| 1999 | 0.55 | 168 |
| 1998 | 0.72 | 159 |
| 1997 | 0.66 | 164 |
| 1996 | 0.61 | 165 |
| 1995 | 0.64 | 165 |
| 1994 | 0.67 | 168 |
| 1993 | 0.76 | 166 |
| 1992 | 0.93 | 155 |
| 1991 | 1.44 | 137 |
| 1990 | 1.32 | 145 |
| 1989 | 0.79 | 170 |
| 1988 | 0.63 | 181 |
| 1987 | 0.6 | 185 |
| 1986 | 0.6 | 181 |