| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2008 | 14.58 | 85 |
| 2007 | 16 | 101 |
| 2006 | 22.28 | 61 |
| 2005 | 8.57 | 127 |
| 2004 | 8.05 | 120 |
| 2003 | 3.52 | 136 |
| 2002 | -1.71 | 148 |
| 2001 | 7.89 | 113 |
| 2000 | 9.27 | 108 |
| 1999 | 8.46 | 115 |
| 1998 | 15.52 | 52 |
| 1997 | 13.74 | 90 |
| 1996 | 7.31 | 117 |
| 1995 | 8.37 | 110 |
| 1994 | 15.76 | 83 |
| 1993 | 18.94 | 66 |
| 1992 | 25.57 | 42 |
| 1991 | 32.18 | 31 |
| 1990 | 36.65 | 27 |
| 1989 | -2.06 | 123 |
| 1988 | -26.89 | 126 |
| 1987 | -3.46 | 115 |
| 1986 | 5.55 | 98 |