| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2009 | 2.28 | 126 |
| 2008 | 5.498 | 76 |
| 2007 | 4.859 | 87 |
| 2006 | 2.83 | 130 |
| 2005 | 1.83 | 146 |
| 2004 | 1.48 | 141 |
| 2003 | 2.12 | 125 |
| 2002 | 6.46 | 59 |
| 2001 | 6.43 | 67 |
| 2000 | 6.73 | 79 |
| 1999 | 5.38 | 93 |
| 1998 | 7.24 | 86 |
| 1997 | 3.63 | 130 |
| 1996 | 4.15 | 123 |
| 1995 | 4.95 | 112 |
| 1994 | 5.21 | 92 |
| 1993 | 5.51 | 90 |
| 1992 | 10.69 | 47 |
| 1991 | 9.6 | 55 |
| 1990 | 9.68 | 51 |
| 1989 | 9.63 | 50 |
| 1988 | 11.49 | 35 |
| 1987 | 12.03 | 29 |
| 1986 | 10.97 | 35 |