| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 0.04 | 118 |
| 2014 | -.98 | 132 |
| 2013 | 0.76 | 110 |
| 2012 | -.64 | 125 |
| 2011 | -1.16 | 128 |
| 2010 | 2.25 | 78 |
| 2009 | 1.72 | 114 |
| 2008 | 2.55 | 102 |
| 2007 | 10.47 | 26 |
| 2006 | 7.89 | 39 |
| 2005 | 10.4 | 23 |
| 2004 | 8.56 | 23 |
| 2003 | 7.29 | 28 |
| 2002 | 4.13 | 60 |
| 2001 | 3.28 | 80 |
| 2000 | 3.04 | 65 |
| 1999 | 5.11 | 38 |
| 1998 | 0.14 | 100 |
| 1997 | 2.66 | 69 |
| 1996 | 4 | 49 |
| 1995 | -.61 | 91 |
| 1994 | -1.92 | 94 |
| 1993 | -1.07 | 90 |
| 1992 | -5.23 | 96 |
| 1991 | -10.45 | 107 |
| 1990 | -.47 | 71 |
| 1989 | 0.38 | 74 |
| 1988 | 4.09 | 29 |
| 1987 | -2.45 | 80 |
| 1986 | -1.6 | 83 |