| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.66 | 12 |
| 2015 | 4.6 | 11 |
| 2014 | 4.57 | 10 |
| 2013 | 4.54 | 9 |
| 2012 | 4.53 | 7 |
| 2011 | 4.53 | 7 |
| 2010 | 4.54 | 8 |
| 2009 | 4.58 | 9 |
| 2008 | 4.64 | 9 |
| 2007 | 4.71 | 10 |
| 2006 | 4.77 | 11 |
| 2005 | 4.84 | 11 |
| 2004 | 4.92 | 12 |
| 2003 | 5 | 13 |
| 2002 | 5.06 | 14 |
| 2001 | 5.12 | 15 |
| 2000 | 5.15 | 18 |
| 1999 | 5.21 | 18 |
| 1998 | 5.25 | 18 |
| 1997 | 5.28 | 22 |
| 1996 | 5.29 | 22 |
| 1995 | 5.3 | 22 |
| 1994 | 5.35 | 22 |
| 1993 | 5.42 | 22 |
| 1992 | 5.48 | 24 |
| 1991 | 5.54 | 29 |
| 1990 | 5.6 | 36 |
| 1989 | 5.68 | 38 |
| 1988 | 5.77 | 41 |
| 1987 | 5.86 | 44 |
| 1986 | 5.94 | 49 |