| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 2.2 | 105 |
| 2015 | 2.3 | 106 |
| 2014 | 3.5 | 99 |
| 2013 | 3.8 | 97 |
| 2012 | 4.1 | 96 |
| 2011 | 5.3 | 97 |
| 2010 | 5.5 | 94 |
| 2009 | 18.4 | 77 |
| 2008 | 13.8 | 84 |
| 2007 | 13.9 | 85 |
| 2006 | 13.2 | 85 |
| 2005 | 1.9 | 110 |
| 2004 | 1 | 124 |
| 2003 | 0.5 | 131 |
| 2002 | 0.8 | 126 |
| 2001 | 0.5 | 139 |
| 2000 | 1.1 | 135 |
| 1999 | 0.4 | 142 |
| 1998 | 0.9 | 135 |
| 1997 | 1.1 | 133 |
| 1996 | 1.1 | 133 |
| 1995 | 1 | 131 |
| 1994 | 2.2 | 125 |
| 1993 | 1.6 | 128 |
| 1992 | 0.6 | 133 |