| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.4 | 178 |
| 2015 | 0.06 | 190 |
| 2014 | -1.01 | 206 |
| 2013 | -1.01 | 205 |
| 2012 | -1.02 | 204 |
| 2011 | -1.03 | 201 |
| 2010 | -1.04 | 205 |
| 2009 | -1.11 | 205 |
| 2008 | -1.19 | 207 |
| 2007 | -1.22 | 207 |
| 2006 | -1.19 | 208 |
| 2005 | -1.19 | 208 |
| 2004 | -1.2 | 209 |
| 2003 | -1.18 | 208 |
| 2002 | -.87 | 205 |
| 2001 | -1.18 | 206 |
| 2000 | -1.23 | 207 |
| 1999 | -1.23 | 209 |
| 1998 | -1.43 | 208 |
| 1997 | -2.3 | 210 |
| 1996 | -2.97 | 209 |
| 1995 | -3.1 | 208 |
| 1994 | -1.46 | 203 |
| 1993 | 0.33 | 181 |
| 1992 | 0.34 | 182 |
| 1991 | 0.27 | 188 |
| 1990 | -.46 | 202 |
| 1989 | 0.39 | 188 |
| 1988 | 1.6 | 150 |
| 1987 | 1.44 | 155 |
| 1986 | 1.51 | 149 |