| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -.46 | 102 |
| 2015 | -3.06 | 140 |
| 2014 | -2.12 | 140 |
| 2013 | 1.4 | 99 |
| 2012 | 2.47 | 86 |
| 2011 | 1.4 | 90 |
| 2010 | -1.5 | 135 |
| 2009 | -.6 | 138 |
| 2008 | 3.4 | 83 |
| 2007 | 2.7 | 97 |
| 2006 | 2.3 | 97 |
| 2005 | 1.4 | 105 |
| 2004 | 2.1 | 87 |
| 2003 | 2.4 | 82 |
| 2002 | 2.59 | 89 |
| 2001 | -.79 | 121 |
| 2000 | 2 | 82 |
| 1999 | 3.1 | 64 |
| 1998 | 1 | 95 |
| 1997 | -2.4 | 117 |
| 1996 | 3.1 | 56 |
| 1995 | -1.1 | 94 |
| 1994 | -2.9 | 98 |
| 1993 | -6.4 | 105 |
| 1992 | -11.8 | 104 |
| 1991 | -11.3 | 108 |