| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 5.3 | 29 |
| 2015 | 4.5 | 63 |
| 2014 | 4.2 | 69 |
| 2013 | 4.8 | 56 |
| 2012 | 5.1 | 55 |
| 2011 | 4.4 | 61 |
| 2010 | 4.9 | 74 |
| 2009 | 5 | 79 |
| 2008 | 2.9 | 92 |
| 2007 | 3.8 | 77 |
| 2006 | 3.7 | 70 |
| 2005 | 4.2 | 52 |
| 2004 | 4.1 | 58 |
| 2003 | 4.9 | 53 |
| 2002 | 5.3 | 41 |
| 2001 | 5.1 | 34 |
| 2000 | 5.4 | 23 |
| 1999 | 6 | 24 |
| 1998 | 6.1 | 15 |
| 1997 | 5.1 | 28 |
| 1996 | 4.9 | 27 |
| 1995 | 4.9 | 28 |
| 1994 | 2.9 | 65 |
| 1993 | 2.1 | 85 |
| 1992 | 2.2 | 77 |
| 1991 | 2.1 | 77 |
| 1990 | 2.9 | 54 |
| 1989 | 1.5 | 87 |
| 1988 | 1.5 | 91 |
| 1987 | 1.3 | 99 |
| 1986 | 0.6 | 110 |