| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.78 | 121 |
| 2015 | 0.62 | 125 |
| 2014 | 0.44 | 145 |
| 2013 | 0.06 | 146 |
| 2012 | -.3 | 150 |
| 2011 | 1.59 | 127 |
| 2010 | 1.46 | 132 |
| 2009 | -3.44 | 132 |
| 2008 | -.36 | 159 |
| 2007 | 1.73 | 149 |
| 2006 | 1.66 | 154 |
| 2005 | 0.84 | 159 |
| 2004 | 2.03 | 142 |
| 2003 | 0.11 | 161 |
| 2002 | 0.39 | 134 |
| 2001 | 1.22 | 112 |
| 2000 | 3.17 | 94 |
| 1999 | 2.88 | 74 |
| 1998 | 3.18 | 79 |
| 1997 | 1.98 | 117 |
| 1996 | 1.03 | 136 |
| 1995 | 1.72 | 107 |
| 1994 | 1.97 | 87 |
| 1993 | -1.04 | 119 |
| 1992 | 1.1 | 77 |
| 1991 | 0.96 | 79 |
| 1990 | 2.33 | 68 |
| 1989 | 3.73 | 47 |
| 1988 | 4.09 | 57 |
| 1987 | 1.95 | 74 |
| 1986 | 1.75 | 85 |