| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 3.63 | 39 |
| 2015 | 3.68 | 41 |
| 2014 | 3.72 | 39 |
| 2013 | 3.77 | 39 |
| 2012 | 3.8 | 39 |
| 2011 | 3.84 | 38 |
| 2010 | 3.88 | 37 |
| 2009 | 3.91 | 38 |
| 2008 | 3.93 | 39 |
| 2007 | 3.94 | 39 |
| 2006 | 3.94 | 43 |
| 2005 | 3.93 | 39 |
| 2004 | 3.92 | 42 |
| 2003 | 3.91 | 43 |
| 2002 | 3.89 | 44 |
| 2001 | 3.87 | 44 |
| 2000 | 3.86 | 41 |
| 1999 | 3.84 | 40 |
| 1998 | 3.84 | 42 |
| 1997 | 3.88 | 43 |
| 1996 | 3.96 | 46 |
| 1995 | 4.04 | 42 |
| 1994 | 4.12 | 44 |
| 1993 | 4.2 | 46 |
| 1992 | 4.28 | 46 |
| 1991 | 4.35 | 49 |
| 1990 | 4.43 | 48 |
| 1989 | 4.51 | 50 |
| 1988 | 4.58 | 49 |
| 1987 | 5.29 | 31 |
| 1986 | 5.55 | 32 |