| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 5.5 | 26 |
| 2015 | 5 | 55 |
| 2014 | 5.6 | 40 |
| 2013 | 5.2 | 52 |
| 2012 | 4.3 | 75 |
| 2011 | 3.9 | 83 |
| 2010 | 5.1 | 68 |
| 2009 | 6.6 | 44 |
| 2008 | 5.7 | 32 |
| 2007 | 6.1 | 36 |
| 2006 | 4.4 | 59 |
| 2005 | 3.7 | 67 |
| 2004 | 3.3 | 74 |
| 2003 | 3.7 | 72 |
| 2002 | 4.6 | 54 |
| 2001 | 4.3 | 51 |
| 2000 | 4.4 | 40 |
| 1999 | 6.6 | 11 |
| 1998 | 6.6 | 9 |
| 1997 | 5.7 | 14 |
| 1996 | 4.7 | 29 |
| 1995 | 4.6 | 30 |
| 1994 | 4.9 | 30 |
| 1993 | 3.2 | 59 |
| 1992 | 1.8 | 89 |
| 1991 | 1.5 | 93 |
| 1990 | 1.1 | 101 |
| 1989 | 0.9 | 105 |
| 1988 | 1 | 104 |
| 1987 | 1.5 | 92 |
| 1986 | 1.8 | 86 |