| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.3 | 75 |
| 2015 | 2.693 | 72 |
| 2014 | 2.711 | 84 |
| 2013 | 2.244 | 108 |
| 2012 | 2.553 | 112 |
| 2011 | 2.25 | 117 |
| 2010 | 2.004 | 120 |
| 2009 | 3.17 | 111 |
| 2008 | 2.557 | 137 |
| 2007 | 2.961 | 139 |
| 2006 | 1.587 | 156 |
| 2005 | 1.742 | 148 |
| 2004 | 1.483 | 140 |
| 2003 | 2.063 | 128 |
| 2002 | 2.794 | 118 |
| 2001 | 7.729 | 54 |
| 2000 | 10.584 | 39 |
| 1999 | 23.045 | 15 |
| 1998 | 62.07 | 2 |
| 1997 | 32.014 | 8 |
| 1996 | 24.758 | 22 |