| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 3.7 | 39 |
| 2015 | 3.8 | 82 |
| 2014 | 3.6 | 82 |
| 2013 | 3.2 | 102 |
| 2012 | 3 | 112 |
| 2011 | 3.3 | 101 |
| 2010 | 3.9 | 98 |
| 2009 | 4 | 103 |
| 2008 | 2.5 | 103 |
| 2007 | 2.8 | 105 |
| 2006 | 2.7 | 106 |
| 2005 | 2.8 | 89 |
| 2004 | 3 | 91 |
| 2003 | 2.6 | 97 |
| 2002 | 2.4 | 103 |
| 2001 | 2 | 102 |
| 2000 | 2.5 | 85 |
| 1999 | 2.7 | 82 |
| 1998 | 2.3 | 89 |
| 1997 | 2.4 | 88 |
| 1996 | 1.5 | 115 |
| 1995 | 1.2 | 121 |
| 1994 | 1.2 | 112 |
| 1993 | 0.6 | 129 |
| 1992 | 2.4 | 68 |
| 1991 | 1.7 | 84 |
| 1990 | 2.2 | 73 |
| 1989 | 2.2 | 69 |
| 1988 | 1.8 | 81 |
| 1987 | 1.2 | 101 |