| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.05 | 53 |
| 2015 | -3 | 139 |
| 2014 | 2 | 83 |
| 2013 | 2 | 82 |
| 2012 | 2 | 94 |
| 2011 | 2.31 | 75 |
| 2010 | 25.71 | 5 |
| 2009 | 3.75 | 85 |
| 2008 | 30.22 | 5 |
| 2007 | 52.71 | 4 |
| 2006 | 8.42 | 35 |
| 2005 | 16.52 | 7 |
| 2004 | 25.44 | 4 |
| 2003 | 24.63 | 5 |
| 2002 | -.61 | 117 |
| 2001 | 16.06 | 10 |
| 2000 | -46.77 | 134 |
| 1999 | 6.84 | 30 |
| 1998 | 3.77 | 51 |