| 时间 | 值 | 世界排名 |
|---|---|---|
| 2015 | 2.9 | 95 |
| 2014 | 2.2 | 113 |
| 2013 | 1.6 | 137 |
| 2012 | 1.1 | 148 |
| 2011 | 0.8 | 151 |
| 2010 | 1.4 | 141 |
| 2009 | 0.8 | 152 |
| 2008 | 1.4 | 128 |
| 2007 | 1.7 | 131 |
| 2006 | 1.2 | 137 |
| 2005 | 1.4 | 132 |
| 2004 | 1.4 | 128 |
| 2003 | 1.5 | 122 |
| 2002 | 2.4 | 104 |
| 2001 | 3.6 | 59 |
| 2000 | 4.4 | 43 |
| 1999 | 3.7 | 58 |
| 1998 | 4.4 | 38 |
| 1997 | 1.8 | 104 |
| 1996 | 3.3 | 55 |
| 1995 | 1.9 | 92 |
| 1994 | 0.8 | 127 |
| 1993 | 1.1 | 117 |
| 1992 | 0.6 | 120 |
| 1991 | 2.2 | 75 |
| 1990 | 2.7 | 60 |
| 1989 | 2.4 | 66 |
| 1988 | 3.2 | 46 |
| 1987 | 1.7 | 88 |
| 1986 | 0.9 | 102 |