| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.63 | 11 |
| 2015 | 4.56 | 9 |
| 2014 | 4.52 | 8 |
| 2013 | 4.52 | 8 |
| 2012 | 4.55 | 9 |
| 2011 | 4.59 | 9 |
| 2010 | 4.61 | 9 |
| 2009 | 4.66 | 10 |
| 2008 | 4.69 | 10 |
| 2007 | 4.71 | 11 |
| 2006 | 4.72 | 10 |
| 2005 | 4.72 | 10 |
| 2004 | 4.77 | 10 |
| 2003 | 4.8 | 10 |
| 2002 | 4.83 | 10 |
| 2001 | 4.84 | 11 |
| 2000 | 4.85 | 11 |
| 1999 | 4.91 | 11 |
| 1998 | 4.96 | 13 |
| 1997 | 4.99 | 14 |
| 1996 | 5.01 | 15 |
| 1995 | 5.01 | 16 |
| 1994 | 5.08 | 14 |
| 1993 | 5.13 | 15 |
| 1992 | 5.17 | 15 |
| 1991 | 5.19 | 17 |
| 1990 | 5.19 | 19 |
| 1989 | 5.24 | 20 |
| 1988 | 5.28 | 21 |
| 1987 | 5.3 | 23 |
| 1986 | 5.3 | 25 |