| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 0.13 | 130 |
| 2014 | -.24 | 160 |
| 2013 | 1.51 | 126 |
| 2012 | 2.54 | 131 |
| 2011 | 4.47 | 102 |
| 2010 | 2.08 | 126 |
| 2009 | 0.98 | 133 |
| 2008 | 6.78 | 114 |
| 2007 | 4.41 | 103 |
| 2006 | 5.37 | 79 |
| 2005 | 0.42 | 172 |
| 2004 | -1.89 | 168 |
| 2003 | 1.19 | 136 |
| 2002 | 1.88 | 123 |
| 2001 | 3.35 | 99 |
| 2000 | -2.48 | 163 |
| 1999 | 4.36 | 68 |
| 1998 | 4.39 | 92 |
| 1997 | 8.56 | 54 |
| 1996 | 5.96 | 91 |
| 1995 | 8.35 | 90 |
| 1994 | 3.45 | 116 |
| 1993 | 5.79 | 84 |
| 1992 | 3.12 | 109 |
| 1991 | 9.55 | 67 |
| 1990 | 10.65 | 58 |
| 1989 | 4.56 | 94 |
| 1988 | 4.07 | 90 |
| 1987 | 3.85 | 84 |
| 1986 | 10.87 | 47 |