| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 3.08 | 26 |
| 2014 | 3.54 | 20 |
| 2013 | 3.51 | 19 |
| 2012 | 3.94 | 12 |
| 2011 | 3.08 | 26 |
| 2010 | 3.33 | 23 |
| 2009 | 3.38 | 23 |
| 2008 | 3.32 | 22 |
| 2007 | 3.23 | 23 |
| 2006 | 3.24 | 22 |
| 2005 | 3.87 | 15 |
| 2004 | 3.41 | 23 |
| 2003 | 3.51 | 22 |
| 1993 | 1.81 | 90 |
| 1991 | 6.51 | 15 |
| 1990 | 6.41 | 18 |
| 1989 | 6.53 | 14 |
| 1988 | 6.49 | 13 |
| 1987 | 6.56 | 11 |
| 1986 | 6.47 | 9 |