| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.51 | 61 |
| 2015 | 1.1 | 93 |
| 2014 | 0.19 | 112 |
| 2013 | -.02 | 119 |
| 2012 | -.7 | 127 |
| 2011 | -.01 | 115 |
| 2010 | 1.34 | 97 |
| 2009 | -.3 | 77 |
| 2008 | -.12 | 111 |
| 2007 | 1.86 | 102 |
| 2006 | 1.5 | 104 |
| 2005 | 1.74 | 110 |
| 2004 | 1.25 | 110 |
| 2003 | 0.79 | 101 |
| 2002 | 1.34 | 85 |
| 2001 | 1.8 | 68 |
| 2000 | 2.97 | 51 |
| 1999 | 2.97 | 53 |
| 1998 | 3.64 | 52 |
| 1997 | 0.28 | 100 |
| 1996 | 1.59 | 89 |
| 1995 | 1.39 | 68 |
| 1994 | 1.33 | 64 |
| 1993 | -.45 | 72 |
| 1992 | 0.66 | 60 |
| 1991 | 0.59 | 59 |
| 1990 | 2.01 | 37 |
| 1989 | 2.6 | 40 |
| 1988 | 2.72 | 43 |
| 1987 | 2.69 | 33 |
| 1986 | 3.07 | 39 |