| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.124 | 90 |
| 2015 | 2.713 | 99 |
| 2014 | 2.132 | 123 |
| 2013 | 2.499 | 114 |
| 2012 | 2.964 | 111 |
| 2011 | 6.322 | 49 |
| 2010 | -4.482 | 171 |
| 2009 | -8.572 | 167 |
| 2008 | -.71 | 158 |
| 2007 | 10.283 | 38 |
| 2006 | 11.006 | 19 |
| 2005 | 12.763 | 9 |
| 2004 | 8.961 | 36 |
| 2003 | 9.938 | 15 |
| 2002 | 5.619 | 51 |
| 2001 | 7.177 | 22 |
| 2000 | 5.798 | 47 |
| 1999 | 5.164 | 51 |
| 1998 | 7.913 | 19 |
| 1997 | 7.55 | 30 |
| 1996 | 2.623 | 102 |