| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 4.6 | 35 |
| 2015 | 4.5 | 65 |
| 2014 | 4.9 | 51 |
| 2013 | 4.7 | 63 |
| 2012 | 4.6 | 65 |
| 2011 | 4.3 | 63 |
| 2010 | 4.1 | 95 |
| 2009 | 4.3 | 96 |
| 2008 | 3.1 | 78 |
| 2007 | 3.1 | 95 |
| 2006 | 3 | 92 |
| 2005 | 3.3 | 71 |
| 2004 | 3.3 | 79 |
| 2003 | 3.5 | 77 |
| 2002 | 3 | 80 |
| 2001 | 2.6 | 80 |
| 2000 | 2 | 101 |
| 1999 | 2.2 | 102 |
| 1998 | 2.4 | 84 |
| 1997 | 3.4 | 58 |
| 1996 | 2.7 | 72 |
| 1995 | 2.8 | 63 |
| 1994 | 0.9 | 126 |
| 1993 | 4.1 | 41 |
| 1992 | 3.2 | 51 |
| 1991 | 3.6 | 45 |
| 1990 | 2.3 | 71 |
| 1989 | 1.8 | 80 |
| 1988 | 2.1 | 73 |
| 1987 | 6 | 18 |
| 1986 | 3 | 55 |