| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.48 | 153 |
| 2015 | -.52 | 154 |
| 2014 | -.6 | 154 |
| 2013 | -.72 | 160 |
| 2012 | -.72 | 158 |
| 2011 | -.96 | 168 |
| 2010 | -1.35 | 178 |
| 2009 | -1.29 | 180 |
| 2008 | -1.37 | 183 |
| 2007 | -1.58 | 188 |
| 2006 | -1.52 | 188 |
| 2005 | -1.56 | 187 |
| 2004 | -1.67 | 192 |
| 2003 | -1.85 | 192 |
| 2002 | -2.01 | 194 |
| 2001 | -2.86 | 196 |
| 2000 | -3.41 | 200 |
| 1999 | -1.95 | 192 |
| 1998 | 0.58 | 101 |
| 1997 | 1.52 | 67 |
| 1996 | 1.76 | 57 |
| 1995 | -.97 | 174 |
| 1994 | -2.14 | 192 |
| 1993 | -.46 | 164 |
| 1992 | -.8 | 175 |
| 1991 | 0.37 | 125 |
| 1990 | 0.96 | 96 |
| 1989 | 0.69 | 113 |
| 1988 | 0.43 | 122 |
| 1987 | 0.36 | 123 |
| 1986 | 0.16 | 136 |