| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2004 | 37.8 | 11 |
| 2003 | 40.06 | 11 |
| 2002 | 39.95 | 12 |
| 2001 | 36.27 | 18 |
| 2000 | 35.77 | 18 |
| 1999 | 36.15 | 19 |
| 1998 | 35.48 | 22 |
| 1997 | 36.97 | 20 |
| 1996 | 33.31 | 31 |
| 1995 | 35.49 | 27 |
| 1994 | 33.87 | 31 |
| 1993 | 28.72 | 38 |
| 1992 | 25.66 | 47 |
| 1991 | 27.51 | 40 |
| 1990 | 30.86 | 31 |
| 1989 | 30.12 | 31 |
| 1988 | 32.01 | 25 |
| 1987 | 32.91 | 23 |
| 1986 | 35.34 | 19 |