| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.02 | 108 |
| 2015 | 2.3 | 88 |
| 2014 | 0.61 | 122 |
| 2013 | 2.42 | 97 |
| 2012 | -.13 | 121 |
| 2011 | 8.27 | 44 |
| 2010 | 13.22 | 15 |
| 2009 | -3.6 | 96 |
| 2008 | -12.51 | 172 |
| 2007 | 9.69 | 34 |
| 2006 | -16.56 | 165 |
| 2005 | -1.26 | 154 |
| 2004 | 1.4 | 138 |
| 2003 | 3.35 | 92 |
| 2002 | -.6 | 129 |
| 2001 | 0.84 | 110 |
| 2000 | -9.37 | 154 |
| 1999 | -13.51 | 158 |
| 1998 | 1.35 | 107 |
| 1997 | 3.65 | 88 |
| 1996 | 3.57 | 80 |
| 1995 | 5.24 | 56 |
| 1994 | 9.05 | 28 |
| 1993 | 6.27 | 34 |
| 1992 | 1.05 | 73 |
| 1991 | -8.09 | 114 |
| 1990 | 16.49 | 8 |
| 1989 | 23.95 | 3 |
| 1988 | -.47 | 90 |
| 1987 | -17.82 | 109 |
| 1986 | 1.75 | 72 |