| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 5.8 | 22 |
| 2015 | 5.3 | 51 |
| 2014 | 4.7 | 55 |
| 2013 | 4.4 | 71 |
| 2012 | 4.5 | 67 |
| 2011 | 4.6 | 56 |
| 2010 | 3.6 | 108 |
| 2009 | 4.5 | 91 |
| 2008 | 3.1 | 83 |
| 2007 | 2.5 | 112 |
| 2006 | 3.3 | 81 |
| 2005 | 3.9 | 59 |
| 2004 | 4.9 | 46 |
| 2003 | 6.5 | 24 |
| 2002 | 7.4 | 14 |
| 2001 | 6.8 | 15 |
| 2000 | 6.9 | 11 |
| 1999 | 8 | 8 |
| 1998 | 7.5 | 6 |
| 1997 | 8 | 7 |
| 1996 | 7.6 | 10 |
| 1995 | 8.1 | 5 |
| 1994 | 9.8 | 2 |
| 1993 | 8.2 | 5 |
| 1992 | 8.2 | 6 |
| 1991 | 7.7 | 6 |
| 1990 | 7.1 | 9 |
| 1989 | 4.8 | 19 |
| 1988 | 5.4 | 15 |
| 1987 | 5.5 | 22 |
| 1986 | 5.4 | 22 |