| 时间 | 值 | 世界排名 |
|---|---|---|
| 2016 | 0.7 | 119 |
| 2015 | 0.8 | 120 |
| 2014 | 1 | 119 |
| 2013 | 1.5 | 111 |
| 2012 | 1.7 | 113 |
| 2011 | 1.7 | 114 |
| 2010 | 1.5 | 114 |
| 2009 | 1.9 | 110 |
| 2008 | 2.3 | 107 |
| 2007 | 2.2 | 109 |
| 2006 | 3.3 | 102 |
| 2005 | 4 | 100 |
| 2004 | 3.6 | 108 |
| 2003 | 3.9 | 110 |
| 2002 | 4 | 112 |
| 2001 | 4 | 119 |
| 2000 | 3.8 | 120 |
| 1999 | 3.2 | 120 |
| 1998 | 3.4 | 121 |
| 1997 | 2 | 128 |
| 1996 | 2.3 | 123 |
| 1995 | 2.4 | 120 |
| 1994 | 2.3 | 123 |
| 1993 | 1.8 | 125 |
| 1992 | 1.1 | 125 |