| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.35 | 17 |
| 2015 | 3.16 | 24 |
| 2014 | 3.11 | 25 |
| 2013 | 3.09 | 26 |
| 2012 | 3.17 | 22 |
| 2011 | 3.24 | 24 |
| 2010 | 3.43 | 20 |
| 2009 | 3.92 | 18 |
| 2008 | 3.88 | 12 |
| 2007 | 3.62 | 14 |
| 2006 | 3.95 | 12 |
| 2005 | 4.29 | 13 |
| 2004 | 4.42 | 13 |
| 2003 | 4.87 | 11 |
| 2002 | 4.92 | 12 |
| 2001 | 4.83 | 13 |
| 2000 | 4.52 | 19 |
| 1999 | 5.21 | 13 |
| 1998 | 5.21 | 17 |
| 1997 | 4.45 | 18 |
| 1996 | 4.25 | 20 |
| 1995 | 4.18 | 20 |
| 1994 | 3.79 | 25 |
| 1993 | 4.09 | 23 |
| 1992 | 4.47 | 20 |
| 1991 | 4.45 | 24 |
| 1990 | 4.63 | 23 |
| 1989 | 4.49 | 24 |
| 1988 | 4.55 | 24 |
| 1987 | 4.87 | 20 |
| 1986 | 5.44 | 16 |