| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 1.5 | 110 |
| 2015 | 1.4 | 114 |
| 2014 | 1.4 | 115 |
| 2013 | 1.4 | 114 |
| 2012 | 1 | 122 |
| 2011 | 0.4 | 133 |
| 2010 | 0.1 | 129 |
| 2009 | 2.4 | 106 |
| 2008 | 2.6 | 106 |
| 2007 | 2.6 | 107 |
| 2006 | 2.5 | 105 |
| 2005 | 2.5 | 106 |
| 2004 | 2.3 | 114 |
| 2003 | 1.9 | 116 |
| 2002 | 1.8 | 118 |
| 2001 | 1.6 | 128 |
| 2000 | 1.7 | 129 |
| 1999 | 1.5 | 132 |
| 1998 | 1.7 | 129 |
| 1997 | 0.9 | 135 |
| 1996 | 0.9 | 135 |
| 1995 | 0.9 | 133 |
| 1994 | 0.8 | 134 |
| 1993 | 0.8 | 133 |
| 1992 | 0.8 | 130 |
| 1991 | 0.8 | 125 |
| 1990 | 0.8 | 124 |
| 1989 | 0.1 | 130 |
| 1988 | 0.1 | 133 |
| 1987 | 0.1 | 131 |
| 1986 | 0.2 | 130 |