| 时间 | 值 | 世界排名 |
|---|---|---|
| 2015 | 5.6 | 48 |
| 2014 | 5.7 | 36 |
| 2013 | 4.8 | 58 |
| 2012 | 4.4 | 70 |
| 2011 | 4.3 | 66 |
| 2010 | 4.3 | 90 |
| 2009 | 5.5 | 62 |
| 2008 | 3.3 | 76 |
| 2007 | 3.9 | 72 |
| 2006 | 3 | 91 |
| 2005 | 2.8 | 88 |
| 2004 | 3 | 90 |
| 2003 | 3.1 | 84 |
| 2002 | 2.6 | 93 |
| 2001 | 2.3 | 92 |
| 2000 | 2.1 | 96 |
| 1999 | 3 | 73 |
| 1998 | 2 | 97 |
| 1997 | 1.8 | 108 |
| 1996 | 2.3 | 87 |
| 1995 | 2.2 | 85 |
| 1994 | 2.9 | 66 |
| 1993 | 2.2 | 78 |
| 1992 | 2.6 | 62 |
| 1991 | 4.7 | 29 |
| 1990 | 3.5 | 36 |
| 1989 | 3.7 | 35 |
| 1988 | 2.8 | 55 |
| 1987 | 4.6 | 31 |
| 1986 | 4.6 | 31 |