| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -2.22 | 108 |
| 2015 | -1.13 | 134 |
| 2014 | 1.14 | 104 |
| 2013 | 0.77 | 109 |
| 2012 | 2.8 | 82 |
| 2011 | 9.75 | 24 |
| 2010 | 5.79 | 36 |
| 2009 | 8.47 | 45 |
| 2008 | 12.09 | 18 |
| 2007 | 1.71 | 111 |
| 2006 | 6.23 | 52 |
| 2005 | -1.91 | 132 |
| 2004 | 0.74 | 111 |
| 2003 | 3.35 | 66 |
| 2002 | 9.71 | 22 |
| 2001 | 2.96 | 84 |
| 2000 | 0.11 | 108 |
| 1999 | 2.5 | 73 |
| 1998 | 3 | 66 |
| 1997 | 2 | 77 |
| 1996 | 4 | 48 |
| 1995 | 4.1 | 38 |
| 1994 | 4 | 36 |
| 1993 | -.4 | 86 |
| 1992 | 9.3 | 18 |
| 1991 | 9.5 | 19 |
| 1990 | 1.5 | 61 |
| 1989 | -8.3 | 94 |
| 1988 | 6.7 | 19 |
| 1987 | -5.3 | 87 |
| 1986 | -5.2 | 88 |