| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2013 | 1.59 | 93 |
| 2012 | -.72 | 126 |
| 2011 | -4.71 | 149 |
| 2010 | -3.36 | 141 |
| 2009 | 2.52 | 103 |
| 2008 | -4.69 | 149 |
| 2007 | -.84 | 139 |
| 2006 | -.42 | 131 |
| 2005 | 4.09 | 62 |
| 2004 | 0.57 | 113 |
| 2003 | 0.26 | 115 |
| 2002 | 6.87 | 35 |
| 2001 | 3.89 | 67 |
| 2000 | -5.57 | 126 |
| 1999 | 4.31 | 44 |
| 1998 | 1.89 | 86 |
| 1997 | 5.2 | 37 |
| 1996 | 4.99 | 39 |
| 1995 | 6.99 | 20 |
| 1994 | 0.29 | 81 |
| 1993 | 1.02 | 71 |
| 1992 | 0.15 | 76 |
| 1991 | -.51 | 88 |
| 1990 | 3.15 | 44 |
| 1989 | 8.73 | 16 |
| 1988 | 7.27 | 17 |
| 1987 | 6.04 | 26 |
| 1986 | 5.18 | 31 |