| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.37 | 104 |
| 2015 | 0.92 | 118 |
| 2014 | -.93 | 145 |
| 2013 | 0.84 | 123 |
| 2012 | -1.18 | 129 |
| 2011 | 1.28 | 134 |
| 2010 | 0.58 | 139 |
| 2009 | -6.03 | 113 |
| 2008 | -2.98 | 152 |
| 2007 | 2.72 | 114 |
| 2006 | 1.92 | 132 |
| 2005 | 1.31 | 136 |
| 2004 | 2.27 | 127 |
| 2003 | 1.25 | 126 |
| 2002 | 0.44 | 120 |
| 2001 | 2.47 | 81 |
| 2000 | 5.15 | 71 |
| 1999 | 3.8 | 75 |
| 1998 | 3.94 | 81 |
| 1997 | 0.98 | 116 |
| 1996 | -.39 | 122 |
| 1995 | 2.97 | 77 |
| 1994 | 0.75 | 101 |
| 1993 | -4.11 | 100 |
| 1992 | 1.33 | 71 |
| 1991 | 0.66 | 74 |
| 1990 | 4.01 | 47 |
| 1989 | 4.02 | 60 |
| 1988 | 5.24 | 50 |
| 1987 | 1.2 | 78 |
| 1986 | 1.38 | 77 |