| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 1.4 | 112 |
| 2015 | 2.5 | 103 |
| 2014 | 2.9 | 104 |
| 2013 | 3.7 | 98 |
| 2012 | 2.1 | 108 |
| 2011 | 5.7 | 96 |
| 2010 | 7.5 | 87 |
| 2009 | 0.4 | 125 |
| 2008 | 0.5 | 125 |
| 2007 | 0.3 | 125 |
| 2006 | 0.3 | 125 |
| 2005 | 0.3 | 127 |
| 2004 | 0.3 | 133 |
| 2003 | 0.3 | 134 |
| 2002 | 0.2 | 133 |
| 2001 | 0.3 | 142 |
| 2000 | 0.3 | 144 |
| 1999 | 0.3 | 144 |
| 1998 | 0.3 | 144 |
| 1997 | 0.3 | 144 |
| 1996 | 0.3 | 142 |
| 1995 | 0.4 | 137 |
| 1994 | 0.3 | 142 |
| 1993 | 0.3 | 141 |
| 1992 | 3.8 | 114 |
| 1991 | 9.4 | 95 |
| 1990 | 10.3 | 98 |
| 1989 | 4.7 | 108 |
| 1988 | 3.8 | 112 |
| 1987 | 8.7 | 102 |
| 1986 | 10.8 | 89 |