| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.3 | 147 |
| 2015 | -.39 | 148 |
| 2014 | -.47 | 152 |
| 2013 | -.49 | 151 |
| 2012 | -.43 | 151 |
| 2011 | -.32 | 147 |
| 2010 | -.17 | 143 |
| 2009 | -.03 | 134 |
| 2008 | 0.06 | 134 |
| 2007 | 0.08 | 129 |
| 2006 | 0.05 | 132 |
| 2005 | 0 | 137 |
| 2004 | 0.01 | 136 |
| 2003 | 0.05 | 134 |
| 2002 | 0.14 | 129 |
| 2001 | 0.28 | 117 |
| 2000 | 0.41 | 107 |
| 1999 | 0.54 | 103 |
| 1998 | 0.7 | 97 |
| 1997 | 0.89 | 92 |
| 1996 | 1.1 | 84 |
| 1995 | 1.69 | 58 |
| 1994 | 2.06 | 49 |
| 1993 | 2.22 | 48 |
| 1992 | 2.34 | 41 |
| 1991 | 2.41 | 37 |
| 1990 | 2.46 | 32 |
| 1989 | 2.51 | 35 |
| 1988 | 2.52 | 32 |
| 1987 | 2.51 | 39 |
| 1986 | 2.47 | 39 |