| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.14 | 137 |
| 2015 | -.09 | 133 |
| 2014 | -.03 | 131 |
| 2013 | 0.03 | 128 |
| 2012 | 0.09 | 123 |
| 2011 | 0.15 | 122 |
| 2010 | 0.21 | 117 |
| 2009 | 0.27 | 120 |
| 2008 | 0.34 | 117 |
| 2007 | 0.42 | 111 |
| 2006 | 0.51 | 111 |
| 2005 | 0.59 | 110 |
| 2004 | 0.67 | 103 |
| 2003 | 0.72 | 99 |
| 2002 | 0.8 | 92 |
| 2001 | 0.9 | 88 |
| 2000 | 1.02 | 81 |
| 1999 | 1.12 | 78 |
| 1998 | 1.13 | 78 |
| 1997 | 1.02 | 83 |
| 1996 | 0.82 | 97 |
| 1995 | 0.59 | 108 |
| 1994 | -1.36 | 181 |
| 1993 | -1.52 | 184 |
| 1992 | -1.51 | 185 |
| 1991 | -1.21 | 177 |
| 1990 | -1.01 | 174 |
| 1989 | -.91 | 169 |
| 1988 | -.81 | 164 |
| 1987 | -.72 | 163 |
| 1986 | -.65 | 165 |