| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.15 | 68 |
| 2015 | 0.63 | 161 |
| 2014 | 1.45 | 139 |
| 2013 | -.25 | 177 |
| 2012 | 0.84 | 160 |
| 2011 | 3.94 | 83 |
| 2010 | -3.65 | 182 |
| 2009 | 1.22 | 142 |
| 2008 | 0.62 | 167 |
| 2007 | 3.7 | 116 |
| 2006 | 0.86 | 165 |
| 2005 | 4.85 | 69 |
| 2004 | -3.5 | 187 |
| 2003 | 0.54 | 159 |
| 2002 | 2.48 | 97 |
| 2001 | 5.64 | 36 |
| 2000 | 21.94 | 5 |
| 1999 | 9.47 | 20 |
| 1998 | 3.77 | 56 |
| 1997 | 1.61 | 105 |
| 1996 | 0.41 | 139 |
| 1995 | 2.24 | 60 |
| 1994 | 3.21 | 30 |
| 1993 | 1.2 | 75 |
| 1992 | 0.67 | 82 |
| 1991 | 1.12 | 61 |
| 1990 | 0.82 | 74 |
| 1989 | 0.97 | 58 |
| 1988 | 0.44 | 78 |
| 1987 | 0.08 | 102 |
| 1986 | 0.19 | 87 |