| 时间 | 值 | 世界排名 |
|---|---|---|
| 2013 | 0 | 151 |
| 2012 | 0 | 146 |
| 2011 | 0 | 155 |
| 2010 | 0 | 151 |
| 2009 | 23.1 | 74 |
| 2008 | 25.5 | 76 |
| 2007 | 26.1 | 75 |
| 2006 | 29 | 73 |
| 2005 | 24.4 | 76 |
| 2004 | 22.8 | 86 |
| 2003 | 20.3 | 86 |
| 2002 | 42.7 | 69 |
| 2001 | 36.9 | 75 |
| 2000 | 42 | 75 |
| 1999 | 46.5 | 72 |
| 1998 | 51.6 | 67 |
| 1997 | 34.4 | 75 |
| 1996 | 41.6 | 68 |
| 1995 | 38.9 | 66 |
| 1994 | 25 | 75 |
| 1993 | 21.7 | 78 |
| 1992 | 9.3 | 104 |
| 1991 | 9.6 | 94 |
| 1990 | 13.1 | 92 |
| 1989 | 19.1 | 74 |
| 1988 | 38.3 | 57 |
| 1987 | 36.7 | 57 |
| 1986 | 34.8 | 54 |