| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -3.97 | 167 |
| 2015 | -.38 | 156 |
| 2014 | 2.34 | 82 |
| 2013 | 4.9 | 26 |
| 2012 | 2.81 | 68 |
| 2011 | 0.38 | 153 |
| 2010 | 1.88 | 117 |
| 2009 | -.31 | 81 |
| 2008 | -.96 | 165 |
| 2007 | 2.79 | 127 |
| 2006 | 4.61 | 83 |
| 2005 | 4.96 | 59 |
| 2004 | 2.9 | 118 |
| 2003 | 3.26 | 80 |
| 2002 | 3.61 | 55 |
| 2001 | -.02 | 146 |
| 2000 | 0.24 | 156 |
| 1999 | 1.02 | 121 |
| 1998 | 0.4 | 138 |
| 1997 | 0.82 | 145 |
| 1996 | 1.62 | 118 |
| 1995 | 2.75 | 77 |
| 1994 | 0.47 | 118 |
| 1993 | 1.1 | 85 |
| 1992 | 0.9 | 83 |
| 1991 | -1.03 | 110 |
| 1990 | 16.99 | 4 |
| 1989 | 8.54 | 11 |
| 1988 | 2.08 | 96 |
| 1987 | 9.75 | 9 |
| 1986 | 7.81 | 14 |