| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.04 | 59 |
| 2015 | 1.91 | 98 |
| 2014 | 0.16 | 128 |
| 2013 | -1.23 | 145 |
| 2012 | 1.61 | 104 |
| 2011 | 2.76 | 113 |
| 2010 | -.01 | 146 |
| 2009 | -10.58 | 148 |
| 2008 | -1.17 | 142 |
| 2007 | -2.48 | 153 |
| 2006 | 3.84 | 109 |
| 2005 | -.84 | 150 |
| 2004 | 2.59 | 126 |
| 2003 | -1.16 | 148 |
| 2002 | -1.56 | 136 |
| 2001 | -1.06 | 131 |
| 2000 | 3.82 | 96 |
| 1999 | 3 | 85 |
| 1998 | 2.16 | 98 |
| 1997 | 5.27 | 68 |
| 1996 | 0.16 | 120 |
| 1995 | 6.06 | 46 |
| 1994 | 8.01 | 36 |
| 1993 | -5.41 | 102 |
| 1992 | 1.33 | 70 |
| 1991 | -.35 | 83 |
| 1990 | -2.65 | 96 |
| 1989 | 2.04 | 76 |
| 1988 | 0.01 | 86 |
| 1987 | 0.25 | 86 |
| 1986 | 6.07 | 41 |