| 时间 | 值 | 世界排名 |
|---|---|---|
| 2015 | 2.7 | 101 |
| 2014 | 2.8 | 101 |
| 2013 | 3.1 | 107 |
| 2012 | 2.8 | 118 |
| 2011 | 2.2 | 125 |
| 2010 | 3 | 119 |
| 2009 | 4.3 | 95 |
| 2008 | 3.6 | 66 |
| 2007 | 3.5 | 85 |
| 2006 | 1.9 | 126 |
| 2005 | 1.3 | 135 |
| 2004 | 1.8 | 116 |
| 2003 | 1.7 | 120 |
| 2002 | 2.5 | 100 |
| 2001 | 2.4 | 87 |
| 2000 | 2.8 | 75 |
| 1999 | 3.5 | 59 |
| 1998 | 3 | 68 |
| 1997 | 2.6 | 80 |
| 1996 | 2.3 | 88 |
| 1995 | 2.7 | 67 |
| 1994 | 3 | 63 |
| 1993 | 2.8 | 65 |
| 1992 | 3.4 | 44 |
| 1991 | 2.2 | 74 |
| 1990 | 3 | 52 |
| 1989 | 2.9 | 58 |
| 1988 | 2.7 | 59 |
| 1987 | 2.7 | 65 |
| 1986 | 2.8 | 63 |