| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.09 | 19 |
| 2015 | 5.05 | 20 |
| 2014 | 5.05 | 20 |
| 2013 | 5.04 | 19 |
| 2012 | 5.02 | 18 |
| 2011 | 4.99 | 18 |
| 2010 | 4.96 | 17 |
| 2009 | 4.99 | 18 |
| 2008 | 5.01 | 17 |
| 2007 | 5.03 | 17 |
| 2006 | 5.04 | 17 |
| 2005 | 5.03 | 17 |
| 2004 | 5.1 | 17 |
| 2003 | 5.15 | 17 |
| 2002 | 5.21 | 19 |
| 2001 | 5.26 | 20 |
| 2000 | 5.29 | 22 |
| 1999 | 5.39 | 24 |
| 1998 | 5.5 | 28 |
| 1997 | 5.6 | 32 |
| 1996 | 5.7 | 34 |
| 1995 | 5.78 | 38 |
| 1994 | 5.82 | 38 |
| 1993 | 5.85 | 39 |
| 1992 | 5.86 | 44 |
| 1991 | 5.86 | 44 |
| 1990 | 5.84 | 44 |
| 1989 | 5.87 | 45 |
| 1988 | 5.88 | 45 |
| 1987 | 5.89 | 46 |
| 1986 | 5.88 | 47 |