| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 0.5 | 122 |
| 2015 | 2.2 | 107 |
| 2014 | 0.6 | 127 |
| 2013 | 0 | 141 |
| 2012 | 1.6 | 115 |
| 2011 | 1.2 | 124 |
| 2010 | 1.2 | 116 |
| 2009 | 0.8 | 119 |
| 2008 | 1.4 | 117 |
| 2007 | 1.4 | 115 |
| 2006 | 1.7 | 113 |
| 2005 | 1.9 | 111 |
| 2004 | 2.3 | 115 |
| 2003 | 1.8 | 118 |
| 2002 | 2.3 | 114 |
| 2001 | 3.3 | 120 |
| 2000 | 3.4 | 122 |
| 1999 | 2.3 | 124 |
| 1998 | 3.5 | 117 |
| 1997 | 3.1 | 123 |
| 1996 | 3 | 120 |
| 1995 | 2.9 | 119 |
| 1994 | 2.1 | 126 |
| 1993 | 1.8 | 126 |
| 1992 | 2.1 | 119 |
| 1991 | 4.2 | 108 |
| 1990 | 1.4 | 121 |
| 1989 | 1.6 | 118 |
| 1988 | 2.7 | 114 |
| 1987 | 2.5 | 119 |
| 1986 | 2 | 118 |