| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.28 | 104 |
| 2015 | 0.13 | 113 |
| 2014 | 1.67 | 115 |
| 2013 | 1.14 | 114 |
| 2012 | 2.82 | 80 |
| 2011 | 2.59 | 108 |
| 2010 | -.16 | 109 |
| 2009 | -.72 | 114 |
| 2008 | 3.22 | 91 |
| 2007 | 4.73 | 61 |
| 2006 | 3.64 | 77 |
| 2005 | 2.24 | 84 |
| 2004 | 4.32 | 76 |
| 2003 | 4.67 | 53 |
| 2002 | 3.32 | 68 |
| 2001 | 3.44 | 69 |
| 2000 | 3.38 | 70 |
| 1999 | 9.65 | 23 |
| 1998 | -6.38 | 143 |
| 1997 | 3.09 | 65 |
| 1996 | 3.82 | 71 |
| 1995 | 0.85 | 89 |
| 1994 | 2.6 | 57 |
| 1993 | 2.13 | 61 |
| 1992 | 0.39 | 78 |
| 1991 | 1.37 | 69 |
| 1990 | 0.48 | 76 |
| 1989 | 3.01 | 60 |
| 1988 | 3.24 | 54 |
| 1987 | 3.22 | 47 |
| 1986 | 3.68 | 46 |