| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2014 | 40.97 | 17 |
| 2013 | 40.65 | 21 |
| 2012 | 38.56 | 31 |
| 2011 | 36.13 | 42 |
| 2010 | 38.96 | 30 |
| 2009 | 36.87 | 29 |
| 2008 | 36.05 | 44 |
| 2007 | 39.23 | 34 |
| 2006 | 39.91 | 31 |
| 2005 | 38.63 | 25 |
| 2004 | 39.86 | 24 |
| 2003 | 41.68 | 18 |
| 2002 | 39.9 | 22 |
| 2001 | 39.41 | 25 |
| 2000 | 40.75 | 21 |
| 1999 | 39.94 | 16 |
| 1998 | 42.36 | 13 |