| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2013 | -.42 | 138 |
| 2012 | 4.67 | 57 |
| 2011 | 3.05 | 109 |
| 2010 | -3.36 | 157 |
| 2009 | -4.96 | 103 |
| 2008 | 3.68 | 83 |
| 2007 | 4.13 | 104 |
| 2006 | 7.07 | 63 |
| 2005 | 6.79 | 51 |
| 2004 | 17.61 | 8 |
| 2003 | -9.79 | 163 |
| 2002 | -11.82 | 161 |
| 2001 | 3.2 | 72 |
| 2000 | 3.83 | 93 |
| 1999 | -8.35 | 157 |
| 1998 | -.31 | 128 |
| 1997 | -2.4 | 140 |
| 1996 | 2.29 | 100 |
| 1995 | 5.39 | 49 |
| 1994 | -1.33 | 104 |
| 1993 | 2.08 | 62 |
| 1992 | 6.33 | 42 |
| 1991 | 11.43 | 18 |
| 1990 | 10.33 | 16 |
| 1989 | -9.56 | 106 |
| 1988 | 6.41 | 41 |
| 1987 | 3.82 | 58 |
| 1986 | 7.56 | 30 |