| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 6.969 | 32 |
| 2015 | 9.196 | 16 |
| 2014 | 6.042 | 45 |
| 2013 | 5.592 | 51 |
| 2012 | 5.533 | 54 |
| 2011 | 4.442 | 64 |
| 2010 | 6.008 | 57 |
| 2009 | 8.583 | 37 |
| 2008 | 5.758 | 74 |
| 2007 | 5.142 | 81 |
| 2006 | 4.075 | 99 |
| 2005 | 3.992 | 82 |
| 2004 | 3.792 | 86 |
| 2003 | 4.475 | 85 |
| 2002 | 4.95 | 81 |
| 2001 | 4.85 | 95 |
| 2000 | 6.508 | 81 |
| 1999 | 13.683 | 28 |
| 1998 | 17.05 | 27 |
| 1997 | 16.767 | 27 |
| 1996 | 55.05 | 4 |
| 1995 | 101.958 | 2 |