| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | -8.85 | 162 |
| 2014 | -3.32 | 158 |
| 2013 | 0.29 | 127 |
| 2012 | 0.63 | 121 |
| 2011 | 1.14 | 126 |
| 2010 | -5.83 | 149 |
| 2009 | -7.83 | 154 |
| 2008 | 7.49 | 44 |
| 2007 | 6.02 | 44 |
| 2006 | -1.43 | 136 |
| 2005 | -.01 | 114 |
| 2004 | -10.56 | 167 |
| 2003 | -9.74 | 157 |
| 2002 | 5.91 | 37 |
| 2001 | -7.9 | 157 |
| 2000 | 7.33 | 28 |
| 1999 | -.6 | 120 |
| 1998 | 1.97 | 80 |
| 1997 | -2.05 | 123 |
| 1996 | 6.46 | 39 |
| 1995 | -6.9 | 121 |
| 1994 | 14.02 | 6 |
| 1993 | -9.28 | 122 |
| 1992 | 3.45 | 56 |
| 1991 | -11.3 | 117 |
| 1990 | -.26 | 78 |
| 1989 | 2.67 | 65 |
| 1988 | -3.1 | 95 |
| 1987 | 3.08 | 49 |
| 1986 | -.27 | 75 |