| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 50.786 | 59 |
| 2015 | 50.816 | 59 |
| 2014 | 50.847 | 56 |
| 2013 | 50.879 | 54 |
| 2012 | 50.912 | 50 |
| 2011 | 50.945 | 49 |
| 2010 | 50.978 | 49 |
| 2009 | 51.01 | 48 |
| 2008 | 51.042 | 47 |
| 2007 | 51.073 | 45 |
| 2006 | 51.104 | 44 |
| 2005 | 51.136 | 42 |
| 2004 | 51.167 | 41 |
| 2003 | 51.2 | 39 |
| 2002 | 51.233 | 36 |
| 2001 | 51.268 | 35 |
| 2000 | 51.305 | 33 |
| 1999 | 51.345 | 33 |
| 1998 | 51.388 | 31 |
| 1997 | 51.432 | 29 |
| 1996 | 51.476 | 28 |
| 1995 | 51.518 | 25 |
| 1994 | 51.559 | 20 |
| 1993 | 51.598 | 19 |
| 1992 | 51.64 | 19 |
| 1991 | 51.691 | 18 |
| 1990 | 51.757 | 17 |
| 1989 | 51.838 | 17 |
| 1988 | 51.934 | 14 |
| 1987 | 52.033 | 14 |
| 1986 | 52.124 | 14 |