| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.81 | 148 |
| 2015 | -1.47 | 165 |
| 2014 | 2.52 | 78 |
| 2013 | 2.97 | 68 |
| 2012 | 2.69 | 72 |
| 2011 | 1.66 | 125 |
| 2010 | 1.78 | 121 |
| 2009 | -3.83 | 138 |
| 2008 | -1.73 | 177 |
| 2007 | -.04 | 176 |
| 2006 | 15.55 | 4 |
| 2005 | 5.91 | 42 |
| 2004 | 2.77 | 124 |
| 2003 | 2.97 | 86 |
| 2002 | -2.23 | 175 |
| 2001 | -.97 | 160 |
| 2000 | -3.39 | 183 |
| 1999 | 4.45 | 39 |
| 1998 | -.35 | 155 |
| 1997 | -6.93 | 188 |
| 1996 | 2.72 | 93 |
| 1995 | 6.72 | 24 |
| 1994 | -5.7 | 163 |
| 1993 | 3.07 | 51 |
| 1992 | -.8 | 111 |
| 1991 | -.9 | 105 |
| 1990 | -4.39 | 146 |
| 1989 | 1.97 | 79 |
| 1988 | -1.03 | 131 |
| 1987 | -.88 | 118 |
| 1986 | 2.81 | 56 |