| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 57.68 | 13 |
| 2014 | 62.06 | 11 |
| 2013 | 65.28 | 10 |
| 2012 | 66.68 | 11 |
| 2011 | 66.62 | 14 |
| 2010 | 66.02 | 14 |
| 2009 | 58.76 | 15 |
| 2008 | 64.99 | 13 |
| 2007 | 62.94 | 13 |
| 2006 | 61.05 | 12 |
| 2005 | 57.08 | 12 |
| 2004 | 53.85 | 13 |
| 2003 | 47.87 | 15 |
| 2002 | 46.67 | 14 |
| 2001 | 44.39 | 16 |
| 2000 | 44.31 | 16 |
| 1999 | 42.55 | 23 |
| 1998 | 41.46 | 23 |