| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2009 | -1.78 | 105 |
| 2008 | 1.17 | 128 |
| 2007 | 2.66 | 129 |
| 2006 | 7.89 | 29 |
| 2005 | 4.06 | 77 |
| 2004 | 2.22 | 132 |
| 2003 | -2.8 | 184 |
| 2002 | -2 | 171 |
| 2001 | -1.87 | 164 |
| 2000 | 1.84 | 129 |
| 1999 | 8.77 | 13 |
| 1998 | 6.04 | 25 |
| 1997 | 5.5 | 39 |
| 1996 | 5.23 | 43 |
| 1995 | 4.27 | 49 |
| 1994 | 5.3 | 33 |
| 1993 | 2.86 | 57 |
| 1992 | 2.24 | 60 |
| 1991 | 0.54 | 87 |
| 1990 | 1.04 | 89 |
| 1989 | 3.34 | 56 |
| 1988 | 4.53 | 47 |
| 1987 | 8.14 | 16 |
| 1986 | 2.99 | 50 |