| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.31 | 6 |
| 2015 | 5.36 | 6 |
| 2014 | 5.42 | 8 |
| 2013 | 5.47 | 9 |
| 2012 | 5.51 | 9 |
| 2011 | 5.55 | 11 |
| 2010 | 5.59 | 8 |
| 2009 | 5.62 | 8 |
| 2008 | 5.64 | 10 |
| 2007 | 5.61 | 11 |
| 2006 | 5.58 | 12 |
| 2005 | 5.52 | 14 |
| 2004 | 5.48 | 16 |
| 2003 | 5.28 | 18 |
| 2002 | 4.4 | 28 |
| 2001 | 4.33 | 26 |
| 2000 | 4.26 | 27 |
| 1999 | 4.2 | 27 |
| 1998 | 4.2 | 28 |
| 1997 | 4.29 | 30 |
| 1996 | 4.47 | 24 |
| 1995 | 4.69 | 20 |
| 1994 | 4.9 | 17 |
| 1993 | 5.04 | 22 |
| 1992 | 5.07 | 27 |
| 1991 | 5.01 | 32 |
| 1990 | 4.89 | 36 |
| 1989 | 4.96 | 35 |
| 1988 | 5.78 | 21 |
| 1987 | 5.78 | 24 |
| 1986 | 5.83 | 30 |