| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 5.49 | 33 |
| 2015 | 5.47 | 34 |
| 2014 | 5.48 | 35 |
| 2013 | 5.5 | 34 |
| 2012 | 5.53 | 34 |
| 2011 | 5.55 | 35 |
| 2010 | 5.58 | 35 |
| 2009 | 5.61 | 34 |
| 2008 | 5.64 | 33 |
| 2007 | 5.68 | 36 |
| 2006 | 5.7 | 38 |
| 2005 | 5.72 | 41 |
| 2004 | 5.76 | 42 |
| 2003 | 5.8 | 43 |
| 2002 | 5.84 | 45 |
| 2001 | 5.87 | 43 |
| 2000 | 5.89 | 47 |
| 1999 | 5.93 | 45 |
| 1998 | 5.97 | 45 |
| 1997 | 6.01 | 46 |
| 1996 | 6.03 | 48 |
| 1995 | 6.05 | 50 |
| 1994 | 6.05 | 48 |
| 1993 | 6.05 | 49 |
| 1992 | 6.03 | 48 |
| 1991 | 6 | 49 |
| 1990 | 5.96 | 48 |
| 1989 | 5.94 | 46 |
| 1988 | 5.92 | 46 |
| 1987 | 5.88 | 45 |
| 1986 | 5.83 | 42 |