| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.55 | 37 |
| 2015 | 5.55 | 36 |
| 2014 | 5.59 | 37 |
| 2013 | 5.63 | 38 |
| 2012 | 5.69 | 38 |
| 2011 | 5.74 | 39 |
| 2010 | 5.78 | 40 |
| 2009 | 5.84 | 42 |
| 2008 | 5.89 | 47 |
| 2007 | 5.93 | 50 |
| 2006 | 5.96 | 52 |
| 2005 | 5.97 | 52 |
| 2004 | 6.02 | 53 |
| 2003 | 6.06 | 54 |
| 2002 | 6.09 | 55 |
| 2001 | 6.1 | 54 |
| 2000 | 6.11 | 53 |
| 1999 | 6.12 | 52 |
| 1998 | 6.13 | 52 |
| 1997 | 6.13 | 49 |
| 1996 | 6.11 | 51 |
| 1995 | 6.07 | 51 |
| 1994 | 6.06 | 49 |
| 1993 | 6.04 | 48 |
| 1992 | 6.01 | 47 |
| 1991 | 5.97 | 48 |
| 1990 | 5.91 | 47 |
| 1989 | 5.87 | 44 |
| 1988 | 5.82 | 44 |
| 1987 | 5.76 | 41 |
| 1986 | 5.69 | 36 |