| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.43 | 107 |
| 2015 | -1.14 | 164 |
| 2014 | -.01 | 151 |
| 2013 | -.22 | 171 |
| 2012 | -.69 | 176 |
| 2011 | 0.23 | 174 |
| 2010 | 0.7 | 167 |
| 2009 | -.48 | 160 |
| 2008 | 2.43 | 170 |
| 2007 | 0.73 | 169 |
| 2006 | 1.06 | 169 |
| 2005 | 1.17 | 162 |
| 2004 | 0.8 | 151 |
| 2003 | 0.64 | 149 |
| 2002 | 0.64 | 147 |
| 2001 | 0.99 | 151 |
| 2000 | 1.54 | 126 |
| 1999 | 0.82 | 126 |
| 1998 | 0.02 | 152 |
| 1997 | 0.52 | 157 |
| 1996 | 0.82 | 154 |
| 1995 | 1.8 | 145 |
| 1994 | 0.86 | 149 |
| 1993 | 3.27 | 110 |
| 1992 | 4.04 | 97 |
| 1991 | 5.88 | 92 |
| 1990 | 5.38 | 92 |
| 1989 | 3.16 | 107 |
| 1988 | 1.88 | 107 |
| 1987 | 1.45 | 102 |
| 1986 | 0.74 | 109 |