| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.907 | 122 |
| 2015 | 4.283 | 133 |
| 2014 | 4.645 | 138 |
| 2013 | 4.97 | 138 |
| 2012 | 5.407 | 123 |
| 2011 | 5.718 | 122 |
| 2010 | 5.888 | 121 |
| 2009 | 5.99 | 123 |
| 2008 | 6.252 | 130 |
| 2007 | 5.788 | 149 |
| 2006 | 5.594 | 143 |
| 2005 | 5.777 | 136 |
| 2004 | 6.028 | 131 |
| 2003 | 5.949 | 130 |
| 2002 | 6.724 | 129 |
| 2001 | 7.196 | 129 |
| 2000 | 7.162 | 133 |
| 1999 | 8.684 | 121 |
| 1998 | 12.807 | 92 |
| 1997 | 13.204 | 87 |
| 1996 | 12.544 | 91 |
| 1995 | 12.799 | 87 |
| 1994 | 13.118 | 78 |
| 1993 | 14.071 | 72 |