| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2013 | 1.24 | 119 |
| 2012 | -1.79 | 135 |
| 2011 | -1.66 | 157 |
| 2010 | 2.81 | 117 |
| 2009 | -12.19 | 152 |
| 2008 | 6.55 | 49 |
| 2007 | -1.28 | 147 |
| 2006 | -1.57 | 152 |
| 2005 | 0.63 | 142 |
| 2004 | 4.6 | 89 |
| 2003 | -2.45 | 152 |
| 2002 | 1.66 | 108 |
| 2001 | 13.43 | 13 |
| 2000 | -.4 | 134 |
| 1999 | 1.68 | 105 |
| 1998 | 12.66 | 12 |
| 1997 | 1.25 | 111 |
| 1996 | 0.23 | 119 |
| 1995 | 6.44 | 44 |
| 1994 | 3.66 | 76 |
| 1993 | 5.1 | 43 |
| 1992 | 7.33 | 33 |
| 1991 | -1.19 | 89 |
| 1990 | 3.33 | 52 |
| 1989 | 1.37 | 79 |
| 1988 | 7.92 | 34 |
| 1987 | 7.22 | 33 |
| 1986 | 2.59 | 64 |