| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.784 | 51 |
| 2015 | 4.117 | 56 |
| 2014 | 4.139 | 59 |
| 2013 | 3.807 | 71 |
| 2012 | 3.731 | 78 |
| 2011 | 4.173 | 70 |
| 2010 | 4.049 | 73 |
| 2009 | 6.5 | 59 |
| 2008 | 6.5 | 68 |
| 2007 | 6.5 | 60 |
| 2006 | 6.5 | 56 |
| 2005 | 6.5 | 52 |
| 2004 | 6.5 | 48 |
| 2003 | 7.5 | 49 |
| 2002 | 7.5 | 52 |
| 2001 | 6.969 | 60 |
| 2000 | 6.875 | 77 |
| 1999 | 6.927 | 82 |
| 1998 | 6.8 | 89 |
| 1997 | 6.8 | 87 |
| 1996 | 6.8 | 90 |