| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 5.1 | 32 |
| 2015 | 4.7 | 60 |
| 2014 | 4.3 | 66 |
| 2013 | 3.8 | 88 |
| 2012 | 3.5 | 100 |
| 2011 | 3.4 | 95 |
| 2010 | 4.2 | 92 |
| 2009 | 4.5 | 87 |
| 2008 | 3.4 | 71 |
| 2007 | 4.5 | 61 |
| 2006 | 5.4 | 35 |
| 2005 | 5.3 | 34 |
| 2004 | 5.9 | 27 |
| 2003 | 6.1 | 30 |
| 2002 | 6.2 | 27 |
| 2001 | 4.9 | 36 |
| 2000 | 5.6 | 22 |
| 1999 | 5 | 37 |
| 1998 | 3.8 | 50 |
| 1997 | 4.8 | 32 |
| 1996 | 5.6 | 16 |
| 1995 | 5.2 | 23 |
| 1994 | 5.2 | 27 |
| 1993 | 5.7 | 17 |
| 1992 | 3.3 | 48 |
| 1991 | 3.7 | 42 |
| 1990 | 4.2 | 28 |
| 1989 | 4.3 | 27 |
| 1988 | 4.3 | 25 |
| 1987 | 5 | 27 |
| 1986 | 4.8 | 30 |