| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.28 | 19 |
| 2015 | 3.25 | 23 |
| 2014 | 3.68 | 17 |
| 2013 | 3.81 | 18 |
| 2012 | 3.46 | 19 |
| 2011 | 3.3 | 21 |
| 2010 | 3.39 | 22 |
| 2009 | 3.29 | 26 |
| 2008 | 3.18 | 24 |
| 2007 | 3.05 | 25 |
| 2006 | 3.11 | 25 |
| 2005 | 3.26 | 21 |
| 2004 | 3.25 | 25 |
| 2003 | 3.49 | 23 |
| 2002 | 3.49 | 27 |
| 2001 | 3.73 | 27 |
| 2000 | 2.21 | 54 |
| 1999 | 2.9 | 38 |
| 1998 | 3.46 | 28 |
| 1997 | 3.58 | 32 |
| 1996 | 3.35 | 27 |
| 1995 | 3.68 | 26 |
| 1994 | 3.83 | 24 |
| 1993 | 3.95 | 27 |
| 1992 | 3.64 | 29 |
| 1991 | 3.56 | 35 |
| 1990 | 3.54 | 37 |
| 1989 | 3.76 | 34 |
| 1988 | 3.57 | 37 |
| 1987 | 3.75 | 37 |
| 1986 | 3.74 | 33 |